Ok, I'll try to give you a few tips that are simple and easy to understand.
I'm no personal trainer or dietitian but I think I have some logic. hahaha
1.) When you're eating a meal, if you're starting to feel a little full and your plate still has a good portion of food left, just let it be. I know it will be whispering to you "EAT ME, YOU KNOW YOU WANT ME INSIDE YOU!", or that could be me in the booth next to you. You don't have to eat it, just set it aside and teach your impulses. Save it for lunch or dinner the next day. Conquer your appetite!
2.) Quit eating so many carbs and throw something green on your plate once in a while. That means cut back on your potatoes, pastas, breads. I know they taste so much better than everything else, but this is a commitment to better yourself. So, when you go get a nice sirloin to eat, instead of french fries and bread, try broccoli or a side salad. It will make you feel positive and speed up your metabolism to make you shit more, and who doesn't want that?
3.) You need to get active, and by "active", I don't mean getting up from the recliner to get a cold beer. You have to put forth some kind of effort to make a change. Walking really isn't that hard. It will boost your self esteem and set you on the right path to not be a fatass. Ride a bicycle, play a sport with friends or coworkers; not on Xbox, go to the gym and laugh at juice heads pretending they're straight. In reality, try to at least walk/jog 30 minutes a day. That's not counting going in the convenience store to get the 2-pack deal on smokes.
4.) Cut back on your snacks. If you get hungry in between meals, don't go for a bag of Doritos or a King Size Reeses. Eat what you know is good for your body. Nutrient rich foods. That means put down the Zebra Cake and eat some real zebra's.. or fruit. Also, if you're drinking 8 sodas a day, you need to stop and drink a healthier alternative. You don't have to cut everything out completely, just use moderation.
Following these few easy steps, you can be a leaner and happier person. You have to stay persistent and patience is key. Don't let the bumps in the process alter your progress, jump those fuckers and keep on rolling. GO GO GO!