It's fruit fly season, but you don't have to spend the next few months constantly swatting them away. To make a foolproof trap, pour a little bit of alcohol, cider vinegar or pure fruit juice in a shallow bowl. Cover the bowl tightly with plastic wrap, and poke a few holes in the plastic with a tip of a sharp knife. The flies get in, but they can't get out. At least they'll die drunk and happy.