Tom Gerhardt and Dan Provost from Studio Neat wrote an exhaustive piece on successfully funding a Kickstarter project:
The most important aspect of a Kickstarter campaign, besides a great project, is the video. Video is the language of Kickstarter. It is generally the first impression a potential backer will have when they view your project.
There are tons of great pointers and behind the scenes stories from their experience of using Kickstarter.