This is a good theme for someone who seems to have trouble saving money, or just likes to keep detailed records of everything! Keep a journal of how much money you spend each week, and on what.

You can make this really creative too: I personally have a “grocery journal” along these lines, because groceries are my main spending. I track how much groceries cost, how many meals I get out of them, and whether its worth it–this is usually based on health value. For example, if I want to save a couple of dollars this week, instead of cutting down on my expensive organic vegetables, I see I can not buy cheezits, which have no nutritional value. It also doubles as a recipe book!