What exactly is the easiest diet for someone who needs to lose 100 pounds, and has trouble with diets?

Eat healthy: 5-7 servings of fruits and vegetables a day. 3-5 ounces of lean meat, chicken or fish as protein, or eggs, or 1 cup of milk. Complex carbohydrates in the form of whole grains, should make up 1/4 of your plate servings. 1/2 your plate should be fresh fruits and or vegetables. And 1/4 of your plate should be protein. Beans and legumes are also healthy carbohydrates. Avoid too much fat, fried foods.