Ever wanted a proportional breakdown of how you spend your time every day? Ever wanted the ability to track trends in how long it takes you to eat breakfast? Want to see a bar graph of that information? Daytum, an ostensibly tongue-in-cheek web and iPhone app, has you covered, allowing you to track any meaningless minutiae you want with scientific precision. (And it sells premium accounts for $4 per month, because of course it does.)
ANNOYANCE POTENTIAL: Truly obnoxious.