Rainy weekend. I spent a good chunk of it counting box tops. You know, those tiny little rectangles that come on products you buy--cereal, soup, baggies, even mac and cheese. They look like unless junk. But you know what? Those tiny rectangles added up to nearly $800 for my youngest daughter's school this year. Here's an example. Things I collected on my weekly walk around the neighborhood. I admit it: Mondays are my favorite days of the week for collecting these goodies. Looks like a bunch of garbage, right? Right there, my friends, is the equivalent of 65 cents! Yes, I know we're not talking about earth-shattering amounts of money, but when it comes to free money you find, maybe, just maybe, 65 cents really isn't too bad. Week after week, it really adds up. Plus, I contribute my own box tops, and my daughter's class is suddenly giving $65, even though we're the only ones who bothered collecting them. To quote a recent episode of my favorite sit...