If you haven’t already, check out 43 Things. The guys over at the Robot Co-op have a pretty cool idea. At a very simple level, treat it like a web based todo list (with the ability to blog upon todo items and get comments!). At a more complex level, the ability to write blog entries associated with "things" you want to do seems especially motivating to get stuff done. You can accomplish something similar same with blog categories but a goal oriented interface just makes it easier to do.

My 43 things is located here.