I very much agree with the parenthetical about pushups. I beemind 30 pushups per day -- http://beeminder.com/d/push -- with the idea that I'll gradually ramp that up as my max reps increases. Except I'm failing to ever do that and have been at 30/day forever. If I cared more I'd ramp it up though. Right now I'm just happy to be forced to maintain some semblance of baseline upper-body strength.

The general point: beemind inputs, not outputs. Ie, things you have total control over.

PS: The Beeminder android app has a pushup counter built in, where you put your phone on the floor and touch your nose to it on each pushup and it tallies them for you.