Okay, I know what you are immediately thinking. "This is a duplicate of the currently stickied thread!" Well, it's not. Let me make it clear, that Roleplaying, and Roleplaying Games, are two completely different things. Roleplaying is done without a character sheet, or stats, but is based off of descriptions of what your character does.
PART 1: BASICS OF CREATION
a) When you create a roleplay, you have to think: "How is this RP different from others? Why will people want to join my RP?" think of this ahead of time, just like when you create an RPG. Creation is basically the same.
b) The one thing that you DO need in a roleplay, is a background. Backgrounds are VERY important, and they set the scene for everyone else. This is also known as 'the storyline'.