There is no magic pill to weight loss, and there is no single solution. If you exercise like crazy, but have a terrible diet full of junk food and deep fat fry everything, then despite your exercise you probably wont make the weight you want. Likewise, a great diet without exercise can only get you so far. It takes a combination of factors, and both diet and exercise, to successfully lose some weight.
One of the most basic steps is to have a healthy diet. There are fad diets to never eat meat, and other fad diets to always eat meat, but never eat carbs. For most people the best way to go is to avoid the fad and gimmick diets and find something reasonable. Making sure to eat all your fruits and vegetables each day is not only healthy, but it fills up your stomach with foods that are very light in calories and often have no fat at all. For the same reason you should eat grains and fiber every day. When it comes to meat, white is generally better than red. If you can replace beef with chicken and pork with fishdo it! The difference between those different meats are huge.
If you are a pop drinker, switch to water. For many people that alone can equal twenty...