From a previous post today:
220lbs
160lbs
There's no big secret to it. Just stop eating so much and be more active. At my heaviest I was eating like a whole pack of cookies a day and doing very little in the way of exercise. These days I cycle/walk absolutely everywhere. Never drive (I don't have a license) and never take public transport unless I'm traveling more than 30 miles. To be honest I still don't eat great. I regularly eat junk, but it's offset by the fact I'm on my feet far more often.
The best advice I can give you really is stop being so greedy. Ask yourself if you really need a portion size
that large, or of you could get away with less. Remind yourself that if you still feel hungry later, you can always eat something else if you really need to.
And don't expect instant results. You probably wont look very different after one week. But you're making changes you expect to last a hell of a lot longer than that too. Just get into the habit of being more active and eating more sensibly and forget all about the whole 'diet' concept.
Oh, and buy one of these instead of wasting money on a gym membership. They're far more useful.