First of all, make sure you read the rules. Read the rules twice over and even three times if you have too. Keep referring back to rules. The rules are and always will be your friend.

Before you start your application, maybe write a checklist of everything that you want to include. This way you can keep track of things, keep organised and you'll know if you forgot anything important.

Try to get to know the owner a little. Don't be a stalker and don't pester them at every hurdle you come to. Keep it to friendly chat, and try to make conversation that does not revolve about the pet you're applying for.

To get you started, you'll need an application layout. Whether the layout is made by you, by a friend, or a premade please make sure that the layout is easy on the eyes and easy to use. Horrid placement or quality can set the mood for your content...so use it to your advantage!

Make your application easy to read, keep the colours simple, the text big enough. If you have a big bulk of text, try breaking it up with some images which relate to the content.

Character design. It seems that most petpage applications include a character design. Fosters like to see how creative you are, so come up with an awesome character! Something original, don't go for the obvious.
Some bad examples would be a Grey pet having a depressive life. A royal pet being a prince or princess. If you chose one of these designs, mix it up a little, don't be afraid to go wild with your design!

If you plan on doing a design, then don't just use the same colour the pet is for your design. Mix it up with some different colours.

If you plan to write a story, do so now. Stories can make up an important aspect of your application. They get across what your character is like when faced with different situations.

If role playing is your thing, go for it! Showing off your talents is a plus. Role play is a more personal way of showing off your design. If you're not too comfortable with it, then just skip it.

Express yourself throughout your application. Even though applications are formal, try to keep that formal tone while being fun and playful with your application. Use everything to your advantage.

Be creative. Do things you've never done before. Try thinking outside the box. Not all applications are the same, there is something special about each one. There is always something you remember about an application that makes you like and remember it. Stand out in the crowd.

Art work is a huge aspect of applications. However, if you're not an artist, don't force yourself. Play to your strengths. Include some of that art you hate, because it shows that you've tried and your dedication to your application.
Same goes for vice versa. If you're a writer, write. If you're an artist, draw. Do what you do best. Just don't make it one sided. Versatility is the key.

If you plan to make any changes to the pet, gender, colour or species change, then please please please! State this at the beginning of your application. Or else confusion could set in, and the owner might think you're applying for another pet and not theirs.

Make everything in your plans section crystal clear. Back absolutely everything up with evidence. This is one of the most important sections, so really think about this.

When making points in your plans section, do you BC? Role play? Neopain times? Show the owner what you have already done. This is your evidence. It shows that you're not making an empty promise. Seriously, back everything up until you're up against a wall or fall off that cliff!

Again, if you've done things with your pets, it's worth mentioning. Every single good aspect about your neopets life if essential to selling yourself to be chosen.

Be truthful. If the owner asks if you've ever been frozen, say so. Don't be a fake just to adopt a pet. Be yourself, you'll feel amazing knowing that you were chosen knowing you were yourself!

If you plan to make a custom pet lookup or petpage, then do it now. Have it ready and display it somewhere. It shows that you're serious about wanting to be chosen. Plus, it backs your plans up. ^_^

Make sure that you credit anything that you didn't make/do yourself. It's just polite to.

Run the whole of your application through a spell checker, proof read it and make sure everything makes sense. Sometimes, we don't recognise our own mistakes, so get someone else to proof read it for you.

Stealing. One thing you will regret doing for the rest of your neopian life! Stealing anything, layouts, images, text, practically anything you did make/do yourself is not tolerated in applications. You will be found out one way or another.

Try to steer away from the chat speak. The one thing in almost every fosters rules is No chat speak. That is there for a very good reason. It makes you look like a fool.

Don't go breaking any rules. It's a general don't for any application really. Rules are meant to be broken, but not in application land.

Kissing up to your foster. Try not to become a stalker of your foster. You do not need to grant them every wish on their wish list and tell them they look beautiful.

Following from the last point, bothering your foster about what they like best in a petpage. It's your application, impress them without them having to tell you what to do.

Harassing other applicants about their applications, does not make you cool.

Now onto the actual content part, do not EVER call the pet you are applying for an it. All neopets are given a gender for a reason. So use the correct gender.

Make sure you spell the pets name correctly, or even have the right pet name in the application!

When writing, try not to change the subject too often. Finish one point before you move on to another.

Do not trade the pet you are applying for. If you're applying with the intention of trading, then I have no words for you. Unless the owner deems it okay, it's not.
If you are an avid pet trader, and are serious about adopting the pet at hand, state that the pet will never be UFT or UFA for that matter.
That also goes for most people, as it's just a general thing to cover.

OMG SHE/HE IS MY DREAM PET!!!!!!!!!! = No.

Over use of the exclamation mark, demonstrated above, shows that you need to have another lesson on grammar. It's annoying and when over used in different and several sentences, it gets tiresome to read.

Tense changes. The one thing which can seriously mess up any simple application. Make sure your tenses are the same when talking in sections.
Or Sharrie will be angry with you.
See the tense change there?
It's baaaaaaad.

If you plan to give your pet a history of some kind, try to steer away from the neglectful previous owner, and you're the happy loving owner who takes them away and saves them. And we all live oh so happy.
Remember that the so called previous owner you're referring to, could be your foster.

An essay. Huge blocks of text are like a portal to darkness.

Love the rules.

Make sure you've neomailed the right person.

Using the correct name and gender is key.

Pace yourself. Most fosters don't want to see more than two neomails, as it clogs up their inbox.
Keep everything short and snappy, to the point.

Make your account look totally epic win and amazing. You will most likely be judged upon your account, so make it look good at all times.

Use proper grammar. Try typing out your application in word first, then mail it.

Try to be honest. It is the best policy after all!

If you find that you run out of room on your neomail, or want to know how much more text you can add. Follow these steps.
1. Hover over the "My account" button on the navigation.
2. Click "preferences" and you'll be taken to your site preferences page.
3. Tick the box which says "Plain Text Neomail".
4. Go back to sending your neomail and you'll be able to see how many characters you have left!

If you create a design for the pet, shove it on a petpage and add a link to it in your neomail. It saves time and space in explaining it.

Mailing the wrong person.

Breaking the rules.

Having sad pets. Would you want your pet you're adopting out to go to someone with sad pets?

Incorrect use of name and gender. It's not that difficult to search up the pet to see the gender or name! (You'd have to know the name to search them up!)

Spending the whole neomail saying the following things.
1. It is my dream pet.
2. He/she is my dream pet.
3. He/she/it will be fed and played with every day.
4. I will love he/she/it.
5. I will cure he/she/it.
6. I will never abandon/neglect/ let it/she/he be sad.
7. Can I adopt it/she/he?

Talking about yourself and nothing else. Who really wants to know what film you watched at the cinema last night?!

Being a liar. Don't say things you know you're not going to do.

Constantly mailing the owner to see if you are chosen.

There is only one owner of MoB and that is me, Ikutsa, or you might know me as Sharrie.
The MoB page will only ever be hosted on www.neopets.com/~Kaisui.

If you see anyone pretending to be myself/Kaisui or have stolen anything from this guide, please do contact me ASAP.

I have thoroughly enjoyed being the owner of MoB and running this page. I'd always wanted to share my application experience and knowledge with people. Along with many other experienced players this guide has been made possible. I'd like to thank everyone that makes a contribution to this page. It enables users to complete their aspirations.
THANK YOU to all who submit MoB points, you're helping all the applicants around. (:
I would try to name and link to you all, but there are just too many. Dx
I appreciate all of your suggestions! :3

Here are just a few buttons that you can display around your account to advertise MoB. (:

Here is the base code to use -

<a href="http://www.neopets.com/~Kaisui"><img src="http://i41.photobucket.com/albums/e274/sharlotte339/MoB/1.png" border="0"></a>

Simply change the 1 in the image url to the number of the button you wish you use.

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9.

The above buttons were made by Benemin for MoB only. No stealing!

Lastly, thank you to Foxx who coded the layout for me!