I suggest working out while you wait for things and perhaps spend less time at the computer. Also consider your diet, are you eating a stuff LOAD of crap or are you eating an average meal (Don't compare to a fat person's meal).
Breakfast, a single bowl of random cereal (Sometimes two if I'm hungry.) I almost never have lunch. Dinner, we have pretty big meals, but my mom keeps it healthy.
For snacks, I've had crackers, cookies, freezies, popsicles, or a bowl of non-milked cerial. (This is not all from today.)
I spend most of my day on the computer. The most I get outside for is to go biking when it's nice out. I used to go for huge endurance runs on my bike alot, and I lost 22 pounds in six months from that once. But I gave up after my road bike got totalled from a minivan that hit me while I was on a public road. The minivan really didn't do much, what did most of it was the fact that I was going around 40 km/h on an 80% carbon-fibre bike. I only broke a two ribs and fractured my wrist (Along with some nasty skin-pizza D:) but that was about it.
I never got the money to repair it/buy a new one, so I stopped. All I use is my stuffty wall-mart "Family" bike, which is mostly aluminum and weighs a ton.