As you may have noticed if you've leafed through a SkyMall catalog or walked into a Brookstone store lately, there are a lot of stupid gadgets out there. If someone can make a buck off it, it will be built. (And as the recent bankruptcy of Sharper Image proves, sometimes even that isn't a prerequisite.) But before you write off the premise of better life through gadgets entirely based on your experiences with an ionic air purifier and a battery-powered margarita blender, take a look at the more practical side of gadgetry. We've rounded up a few of the most downright useful technologies out there. If you haven't already gotten on board with some of them, we'll try our best to make you reconsider.