Chronic dieting and flip-flopping from one fad or restrictive diet to another might be interpreted as an eating disorder.
Try to keep things simple:
First of all throw all of the sugar, artificial sugared and processed 'foods', cookies, ice cream, refined carb foods in the garbage where it belongs.
Second, buy in the following produce: fresh cuts of lean beef, turkey and chicken breast, salmon, tuna, trout. Eggs/egg substitutes. Nuts and legumes. Fresh green vegetables (e.g., spinach, broccoli, cauliflower, etc.). Fruit, especially fresh berries. In moderation you can add some low fat cheese, low fat milk, yogurt (plain unflavored), certain whole grain products (but avoid any sugared cereals). Keep saturated fat below about 5% of total caloric intake.
Avoid products which contain hydrogenated/semi-hydrogenated oils/fats. Avoid fad diet pills - even proven diet aids are useless unless your nutrition plan is clean and your exercise regimen is in sync with your body.
NO cheat foods. DO NOT STARVE yourself.
Good supplementation includes a whey protein (for shakes), a good multi-vitamin (a must), calcium supplement. EFA oils such as Flax Seed Oil, fish oil, or Udo's Blend. Extra Virgin Olive Oil. These oils are far MORE good for you than the current CLA fad.
Aerobic Exercise (3-4 times a week, work your way up to 45 minutes a day - jogging, brisk walking, swimming, cycling, etc.).
Strength Training (3-4 times a week - target all main muscle groups in rotation - allow for adequate rest of at least 48 hours).
Sleep - 8-9 hours a day. No compromise here.
Exposure to natural daylight - at least an hour a day (protect with sun-screen when necessary).
Drink clean fresh water - a gallon a day (more on exercise days).
Put these together -
GOOD GLEAN NUTRITION
AEROBIC EXERCISE
STRENGTH TRAINING
CLEAN AIR, WATER, DAYLIGHT
CORRECT SUPPLEMENTATION
… and that 50 pounds won't stand a chance.
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