Wii fit will definitely help if you do it often. You said you don't diet well, so don't diet. If you are not after weight loss per say and just energy than this can be easy. A walking goal is a great idea. Buy a pedometer today and put it on. For the first day or two, don't try to get in more steps, just be normal. This will tell you how much you walk. Tomorrow add 100 more steps, the next day add 100 more. After you get going, you may end up adding 200, 300 or more steps a day. A person is "supposed" to walk 10,000 steps a day, so work your way up to there. There are many places to get in those steps...just outside, shopping mall, grocery store, costco, parking at the farthest spot from the door of where you are going, and worst case scenario your treadmill. By Christmas, you could easily be to 10,000 steps if you start working now. And bonus there, you WILL lose weight with all that walking if you keep your food intake consistent and don't "reward" yourself for the steps. When you start to fell better, then you will start to want to make changes in your diet and that cant hurt.