[Bungleau]

Why don't you write the story of a game? Play whatever you're currently working on, and write out what happens. Several of us are doing that on the W&W board, and it's a lot of fun. Once you're comfortable, you can start adding in your own elements to the story that may or may not be part of the game.

That way, the majority of the plot and everything else are given, and you just need to add some details to it.