We are in not-complete Beta but if you are signed up to http://www.Quantter.com (log in via twitter for now) you can record things you do just by including in your twitter message this microsyntax: #label:xMetric eg. #run:5miles or #thingsdone:2 ...
If you go to your Quantter settings (top left of profile page), select your "favorite activity" (=the hashtag you 'Quantt'/quantify) and you will seen a green check each time you do that activity at least once. The number of consecutive days you did this activity is your streak (given at the top of your Quantter profile page).
If you go to your Quantter settings (top left of profile page), select your "favorite activity" (=the hashtag you 'Quantt'/quantify) and you will seen a green check each time you do that activity at least once. The number of consecutive days you did this activity is your streak (given at the top of your Quantter profile page).
Finally you can follow 5 other people's streak, just by going on their Quantter page (while being logged in): http://www.quantter.com/user/TwitterUsername (eg. http://www.quantter.com/user/egadenne) and you click on "Follow Username" link under the grid.
As mentioned here, another very good implementation of Seinfeld "don't break the chain" is Kyle Bragger Streak.ly.