"From small things, Mama, big things one day come," as the song goes. It's especially true when it comes to your house. Left unchecked, seemingly minor things (a gutter pitched the wrong way, a bit of crumbly grout) can lead to bigger and expensive issues. The good news is that, in many cases, all it takes to head off catastrophe is a little preventive maintenance. "Don't wait until it's an emergency," says This Old House master carpenter and King of All Awesomeness Norm Abram. "Spot-check areas around your house, preferably twice a year, in the fall and spring." Here are some common issues and how you can save yourself big money (and headaches) by getting in front of problems NOW!