I am doing
43 things.
43 Things is this interesting piece of social software, where you state your goals, and write your progress on each of your goals. Any kind of "goal intersection" that happens, i.e. when your goal matches up with someone else is displayed automagickally. This gives you the opportunity to build up a support system of people willing to help you reach whichever goal you desire.
It needs more integration. I want to see 43 things hooked up to my PDA. It also gives you the opportunity to post your 43 things into your blog, which is hella cool. And it does have RSS everywhere, as well as a REST API. Who knows, maybe I can write a palm conduit, to talk to the todo list!
It also allows you to tag your goals, and is a folksonomy. (other people can tag goals as well). I am not sure to what end however. Are these tags useful? Dunno.