I need to start going to conferences and presenting to improve my CV. That takes money. I also often eat crap. So time to kill two birds with one stone. Any time I think about wasting money on something stupid, I take that same money out of the wallet and drop it in the Stupid Money Box, which I can later use for travel to conferences.
This afternoon I thought about stopping by the department for some M&Ms and a soda on the way to class. I do this a lot. so today I drank some water and now I have $1 in the Stupid Money Box.
It'll be interesting to see how this goes.