Logically speaking, total calories consumed per day dictates how much you will weigh. Calories can be expended through exercise and having an elevated heart rate. That is why I schedule a heavy frequency weight lifting routine for cutting weight. Alcohol is high in calories, and thus cutting it from your diet is an easy way to cut some pounds.
Basic nutritional knowledge should be applied when choosing foods for your diet. For example, high in protein, low in sodium, fat, and carbs. Water should be consumed very regularly. A hydrated body works more efficiently in burning fat. It helps you stay awake and alert, and keeps your body functioning. Water is also the healthiest drink option 95% of the time.
Losing weight is as simple as lowering your total calorie amount per day, being more active, lifting weights, and doing cardio. It's not necessary to do all of those things. Be wary of your sugar consumption as it can breed bad habits and make you crave sweets, which won't provide with the best fuel for your body.