Role-playing isn't something that comes naturally to some people. It was a little hard for me at first, but I got used to it. So I'm here to help you get it better. RP-ing is just like telling a story, except you're limited to only your character. But really, it's not that hard. It's one of those things you learn over time.

Guidelines:
1.) Use the best grammar you can.
In all reality, we don't expect perfect grammar, spelling, and punctuation, but do try your best! We want your posts to be understandable. It would be helpful if you posted "He gasped for breath" instead of *is gasping*. And you might want to turn off that caps lock unless you're SHOUTING. Oh, and pL34s3 D0n'T d0 ThIs. It'S n0T c00l.

2.) Use 3rd person narraration.
Third person is when you are not in the viewpoint of your character. You are the narrorator. Use words like "he", "she", not "I" and "me", unless they're thinking. If everyone was in 3rd person, that'd be less confusing than if it was mixed.

3.) If you are not in character, make sure everyone knows.
You could put brackets or something along those lines so people won't get confused. E.g. {Text} [text] (text). Or OoC: would do. Please don't make us try to tell for ourselves.

4.) Keep yourself seperate from your character.
Let's say that I feel very happy today, but in the RP my character just got stabbed in the stomach. My character should not be happy she got stabbed. Also, let's say I'm a quiet gal. It'd be more interesting and fun to have an alter ego as a rambunctious leader for a character. Also, this improves originality in your character.

5.) Don't make your posts too long/short!
If your posts are too long, people may skim it. If it's too short, you might want to add some more pizzaz, like maybe a thought, physical description, or some vocabulary.

6.) Try not to drag things.
What I mean by dragging is by making things too long. You can drag fights, for example. You don't fight for two whole RP days. You can also drag time. If people need it to be night to RP, why make the day seem ultra long? Vice versa, too.

7.) Know what your rank is.
If you are a lieutenant fighting the a captain, the captain OBVIOUSLY will win, like how easily Byakuya pushed Renji aside, without a scratch. WHOOPS! Spoiler, sorry! For another example, if your character is a lieutenant, why should they know level 90 kido? Unless, they are high-ranking in the Kido Corps (or Aizen).

8.) Pay attention to everyone's posts.
Even if it is not concerning you, read it, because that's what you're supposed to do. And read it, because you can become concerned. Treat others how you would like to be treated. Don't you want your posts to be read?

9.) Do your research.
Maybe your character is good at kido. When he/she performs kido, make sure the spell exsists! This is not only for kido. If you're playing a NOT self-made character (like Ulquiorra or Ichigo), then keep him/her in character. Byakuya is not a guy that will prance around Seireitei with ribbons in his hair, and Aizen is not very keen to mercy.

10.) Remember that you are NOT the main character.
In the real world, the world does not revolve around you. In fantasy, the world, whichever world it may be, still does not revolve around you, especially in a role-play. In a role-play, everyone gets to be a main character, unless they wish otherwise. Others want their fair share of attention, too. A good role-player makes sure they don't hog everything.

Well, I've shared some of my learned wisdom with you. There some other things you should know, but those things you gotta learn on your own (lol, I sound like some old kung-fu master or something). I don't even know what those things are, but I guess I'll find out sometime.

And remember kids, have fun!