Tip # 19 Exercise!
This is one of those things that you're not going to realize how much you're saving unless you don't exercise and develop health problems. Exercise has been shown to help you not only lose weight, but prevent diseases associated with increased body weight (including Type II Diabetes, Coronary Artery Disease, and High Cholesterol). It can also help curb depression symptoms, help you quit smoking, and help with many, many other illnesses or bad habits that cause you to spend more money.
Not only can exercise save money on potential health problems, but you can save some gas money (and car mileage) if you're fortunate enough to live close enough to the store, work, or daycare that you can walk or ride your bike instead of drive every day.