Exercise regularly
Never drink sugar sodas
Eat healthy meals that are in proper portions. Literally this is the one thing that is so hard for most people. A piece of meat the size of a deck of cards, four spoonfuls of rice and two celery pieces is the actual size of what you should be eating proportionally.
Stay away from bread, noodles, cookies, and potato chips
Understand that weight loss isn't a quick fix, it is a complete lifestyle change
Be disciplined and never give up on losing weight, even if you break down and eat a whole pizza or something, don't let that discourage you from eating healthy the next day and the day after that
Exercise Exercise Exercise