Stick with fresh fruits and vegetables, lean meats, low-fat dairy and whole grains. Remember that the body needs all of these nutrients including fats and sugars, but it does not need them in the form of two quarter-pounders with cheese or half a bag of Oreo cookies. In addition to changing your diet to only healthy foods, you should drink plenty of water each day. Coffee, wine, low-calorie alcoholic drinks and beer are all ok once in a while, but drinking three cups of coffee followed by an afternoon of diet soda and two or three drinks at the bar before heading home is not the way to lose weight fast. Beverages like this are loaded with unnecessary calories and sugar that your body does not need.