Here's another fifteen minute project...clean out and organize a few kitchen drawers. I worked on my junk drawer, the drawer that holds the phone books and my silverware drawer. That drawer led to organizing my utinsil drawer. Overall it ended up taking twenty minutes and things got sorted and put where they belong.
If you do this for the next three days, most of your kitchen drawers will be organized! A great time to do this is while something is baking in the oven.