I am overweight & i've tried several diets which didn't work. what's the most efficient way for me to lose weight without spending lots of money?

Diet and exercise: Stick to a low calorie diet and at least 15 minutes of exercise daily.

Achieve balanced: lifestyle. To lose weight insure that calories burned > calories consumed. Drink at least 8 - 8 oz glasses of water /day. Try for 8 hrs of sleep/night. Aim for at least 5 servings of vegetables & 4 of fruit per day. Use whole grains. Avoid sodas, alcohol & junk carbohydrates. Get in a good mix of aerobic & weight lifting exercises.