Zander said:
I am someone who lost 45 lb in two years (well the first 30 lbs in six months, then 15 in 1.5 year). So I will give you my advice, which is an over-simplification of scientific studies (try Dr Seignalet on google to know more if you need, but all sites in French...).
So basically:
1) No more wheat/corn in any form. As such, no more bread, pizza, cakes, spaghettis, and so on (and no more beer ever!).
2) No more milk and dairy products. As such, no more milk, butter, cheese, ice-creams, etc.
3) No more refined sugar. As such, no more chocolate delicacies, sugar in the coffee, coca-cola and like beverages, cakes, etc.
4) Eat preferably raw rather than cooked.
Eating everything else poses no problem. But with such a diet you nonetheless will be led to eat primarily vegetables, fruits, rice, fish, and meat (preferably meat such as chicken).
The great thing with this, is that you loose weight that you won't take again (provided you keep going on with that diet), you loose it effortlessly. I mean: you don't need to starve. Well, the only time you starve is during gaming sessions when everyone else is eating junk food all that time. Myself, I eat (as suggested above) plenty just before going to the game, and then, well, I don't look at all the stuff available...
Exercising is also a good thing, but I have still to go to the gym...
My advice: just do as I suggest for one full month (just one month) and see the result. Remember, it's about the choice of food, not quantities, so you don't need to starve.