Find a program you can stick to - Don't choose a weight loss program that you are sure to fail. You didn't gain 30 pounds in a month and you certainly are not going to lose it that fast. Be wary of any diet that claims rapid weight loss.
Most health professionals agree that slow steady weight loss is more likely to last.
Make small changes - Don't try to change your entire lifestyle at once. If you are trying to eat healthy focus on one thing at a time. For example eating more fruits or vegitables or decreasing fat or sodium. Once you have accomplished one thing move on to the next. Drink at least 8 glasses of water per day - Your body is mostly water.