I started the summer weighing185, and now weigh 172.  Three simple steps that have made a big difference in how I feel.

1. No processed sugar; no soda, no candy, no high fructose corn syrup.
2. No white bread, only whole grain high fiber bread
3. Eat Yogurt, stick with plain yogurt and add fresh or frozen fruit

Of course exercise is important to but those three things have definitely made a difference in my energy level.