It’s, er, pretty high concept — but I love it. Tools that remind you of decisions you’ve made are really valuable.
Reminds me of the trick with the giant wall calendar: First, you decide you’re going to start a new habit. Then you buy a giant wall calendar. And on the first day you successfully do habit X — maybe it’s “floss” or “do 20 sit-ups in the morning” or “practice the electric violin before bed” — you make a big black check-mark on the calendar. Then you do it again the next day.
And then the calendar takes over! The chain becomes impossible to break. As long as X is pretty easy to do, you do it — because your decision, your discipline, is right there staring you in the face.