On the news they talked about this a while ago. 5 small meals is better than 3 larger meals. The 5 small meals helps keep your metabolism going, which is essential for losing weight, and as long as you eat healthy at each meal, you are less tempted to eat unhealthy snacks throughout the day such as chips and soda.
Brandeis, I might also add in there that drinking surgary drinks such as soda is extremely bad for losing wieght. Not only does it add useless calories, but it does not fill you up so you still want to eat more. Plus, it is dehydrating (sp?). As you mentioned earlier, drink a lot of water.
A while back I was motivated like anyone who is not naturally slim to lose some weight, and so I took up running. Eating better was part of it, but getting up at 5 in the morning 3 times a week and running was great. Grab your MP3 player, get outside, and run for about an hour. I was able to cover 5.5 miles in the hour, and that is not a fast pace at all. Within the first week of doing it I noticed quite a change in how I felt and that I had lost some weight.
Kids that really want to lose weight: This is the time. Summer is rapidly approaching, and so if you want to get in shape, put down runescape, WoW, Halo, Call of Duty, whatever it might be and get active. Get in shape now so by the time summer starts, you can relax and happily go to the local pool.
Now wouldn't that be great?