when u go to the grocery store, just buy stuff on the outer perimeter of the store. everything in the middle aisles is all processed. i believe if you eat pure, your body will treat you well. don't fill your body with crap like little debbie snack cakes or diet coke. when you choose a meal, try to pick something that is as close to it's natural state as possible.
example:
orange > orange juice > orange flavored drink with high fructose corn syrup
brown rice >white rice >something made with rice flour
blueberries > blueberry muffin
also don't drink anything but water. i can't drink 2 liters a day of any liquid like others have recommend but when i do drink anything, it is water.
and exercise...looking at the machine, you think you only burn max of 200 cals per workout but for me, adding simple exercise just torches cals somehow....i remember going one week without a car (having only a bike) and i lost like 7 lbs...and i was eating CONSTANTLY...so be sure to add a workout