well it really depends on how desperate you are. You should start by just not eating anything at all. If you can pull it off, great! you may start feeling a little woozy after not eating anything for a while, so you might start to inhale everything within arm's reach that is edible'. If that happens, remember to throw it all back up! you dont want that food turning into calories that turn into lard! it helps if you stick two fingers down your throat, and if that doesnt work, you can always try some ipecac. Another solution that may help you not each much and loose weight is cocaine and other stimulants such as methamphetamine or adderall. Not only will you not be eating very much, you'll be super-energized and burning calories by the truckload. If you're really desperate, then eat some undercooked wild boar. you will get a tapeworm, and that will definitely help you loose some weight. If all else fails, you can staple your stomach and get some liposuction.
another solution would be to switch to fresh (yes, humans are designed to eat vegetables), all-natural (lay off the candy corn), organic (yes that perdue chicken and those del monte canned veggies are killing you), and minimally processed foods (meaning doritos=satan), lay off the simple carbs (white bread, pasta and soda=satan), eat red meat sparingly (burger a week), quit your office job and get the fuck up off the couch or off the computer once in a while. Unfortunately, thats me telling you to stop eating like an american, and it may offend your patriotic sensibilities and skew your love/hate relationship to fat upside-down. If that is true for you, then just stick to the first plan of action. Cocaine, pork, and cosmetic surgery is as american as apple pie.