To be successful in game development, it’s important to map out exactly where you want to go and what you want to do. There seems to be a lot of design-related posts in here, so I would say everyone should give Video Game Design Pro a shot. It’s a design documentation tool used to help guide users through the process of creating their designs. http://www.thecorpament.com/downloads.html

I'd love to use something like that, but I'm not gonna pay for something like that.