[quote=@ArenaSnow]
-Formatting & Presentation. Make it look good and you're more likely to get folks to come along.
-Organization. Make your information easy to follow. Don't put too much detail in and swamp gents, and put enough in so people know what to expect. Having a character sheet together from a start lets people start up ideas early and draws a little more interest sometimes.
-Trends. New movie came out that's big and mainstream? You might get some 'cheap interest' by catering to that. Survivability of such a roleplay may vary.
-Original angles are nice, but sometimes it's just a matter of making the original concept look decent. Trying to be 'incredibly original' for the sake of being original and unique can result in your idea being so odd that people can't properly connect to it.

Note that, while it's important to get a group together in the first place, the real shit job of a leader here is keeping that group alive, interested, and posting so it doesn't die in 3 weeks or over that duration at some point.
[/quote]

I was more or less going to give a lower quality piece of advice that when polished, refined and well thought out, would be this but with fewer points... do as this says. 

BUT here is a little trick: make the Interest Check short and sweet, and leave the immersion details for the OOC or when you have piqued people's interest. Allure them first, then give them the meal... it's like chasing a rabbit.