Get in shape without an expensive gym membership with Wii Fit ($90; May 21). This videogame/personal trainer includes the new Wii Balance Board, a step aerobics-like base filled with sensors to help measure your weight, center of balance, and more. When used with the game, it helps you correctly complete a wide variety of exercises, from yoga to pushups, and includes a variety of mini-games to keep things from getting too serious. With fitness tracking and the ability to set personal goals, it's like having a personal trainer in the living room full time. And for extra fun, check out We Ski ($30), a Balance Board-compatible downhill skiing game.