Set goals. Don’t just wing it. Decide on a realistic amount of weight to lose in a particular time (1-2 pounds per week, or better yet, .5-1% body fat per week). First, decide on a big goal (lose 25lbs in 4 months). Then, divide that up into several smaller goals (lose 8 pounds this month). Each time you reach your smaller goal, it gives you the motivation and confidence to continue on. Start small, and eventually the weight loss will add up.