Got an Android tablet? Widgets are a great way to bring useful info to the home screen, such as Facebook and Twitter updates, news, weather, photos and so on. And live wallpaper -- 3-D fish tanks, animated GIF images and the like -- are fun too. But from a power-saving perspective, widgets and live wallpaper are nonessential drains on the battery. You'll want to zap those widgets that are, well, a tad gratuitous. (Sorry, 3-D fish.) To remove a widget from the Android home screen, long-press it, and then drag it to the Remove icon.