Sorry to buck the eating trend, and as \'Vike said, I\'m not \'fit\' to give advice, but.....
Do something, often, that keeps you physically active. If possible do it in a situation where you have little choice not to do it. AKA get a job that causes you to exercise or lose the weight. If you have enough discipline you could probably skip the job and just work out.
Okay I was at like 280 or so, started this brand new job that had me moving auto parts. After the first day I almost called in sick I hurt so much, but I stuck it out. After the first week I almost quit and did the math. I was moving half a ton of auto parts by hand every shift, 2 shifts a day. So a ton of metal moved through my hands. I stuck it out, I needed the job. Then my friends started commenting on Saturday nights about how much better I looked, how I would stay on the dance floor longer, how I would be willing to stay up later, heck even the women though I could last longer. So I kept it up, eventually I went from a size 42 down to a 38 which isn\'t much, but the biggest change, was in build. I now had Pects, I had Tricepts for the first time. I was still big enough you couldn\'t see my abs but you could feel them.
Now here\'s the human part where I feel like a lard:
After about 7 months of this I was still in a size 38 but I looked damn good (well at least damn better) and for doing such a great job, they offered me an salaried office job, which I promptly took. Within 4 years I\'m quickly nearing that 280 mark again, and this time due to age and sag I\'m up to a 44 pants.
Now the imporant part, the moral if you will (ignoring the obvious don\'t get an office job and spend your days on your ass) is that diet had nothing to do with any of this. I still ate like hell. Pizza twice a week with \"Double Cheeze Peperoni, Bacon, Sausage and Ground Beef\", Lazagna, Peroghi, Pop only beverage diet, Bagles with Creem cheese for breakfast, etc. I never once changed my diet, what caused me to loose all that weight and put on all that muscle was physical activity.
Okay that ended up longer then it should have, but I think you get the point. Diet helps (or so I have been told), but activity makes a HUGE difference.