I'm looking for some general tips on how to keep my Javascript organized and modular. 

The latest javascript heavy project i've worked on looks like [the following][1] (formatted <http://jsfiddle.net/wdkZd/>)

As you can i see i try to namespace my javascript and build quite some seperate functions. Still, when i need to implement features afterwards i can still get lost in my own code sometimes. And i'm getting the idea i can do better on organizing my code.

Any general pointers based on what u can see here?