What are the little things you want to learn about yourself? How much you exercise? Drink coffee? Bathe the dog? Set up Counters for each, then spend a few days tracking them. Then set up Auto-Counters for things like your tweets.
Then, Your Life In Numbers generates as many beautiful bar and pie charts as it can, to let you make sense of everything you do. And theyre all browsable at the flick of a finger.