There are many ways to lose weight, the important question is how to lose weight healthfully and sensibly and in a way that allows you to keep it off in the long term. Most "diets" work short-term, but people end up gaining back weight later. It's important to change your lifestyle permanently, and not go for quick fixes that may cause you to lose a lot of weight fast, but that you aren't able to keep up with.
It takes learning some different ways of food prep, and perhaps changing some of your taste preferences (healthier food might not taste as good at first---believe me, when I was 16-18, I would have refused to eat some of the stuff I eat now...but now I can't stand some of the stuff I ate back then---but you can learn to prefer it.)
I've never used WW, but it seems to work for many. Ediets.com is another program that allows you to choose the type of diet (as in "way of eating" not as in "short-term way of eating for weight loss") you want, and provided recipes and meal plans along with forums for motivation.
Making better choices (baked X instead of fried X, for example) is important. "Picture Perfect Weight Loss" is an interesting book to pick up (check it out at your local library). It compares side-by-side foods and meals with the same amount of calories, to show that by making the better choice, you can automatically cut calories without eating less (eating less can often make you feel unsatisfied, because one component of satiety is how much room your food takes up in your stomach.
I highly recommend Dr. Fuhrman's "Eat For Health," which outlines a 4-step program for healthy eating that also leads to weight loss (you can lose weight in a way that contributes to your long-term health or in a way that may be detrimental to your health---always go for the former). You go step-by-step changing habits and mindset.
Consistent exercise/movement is also important. If you have an active lifestyle (you do lots of yardwork, walk a lot during the day, etc) formal exercise is not as crucial (except for working on imbalances and for injury prevention), but if you have a pretty sedentary lifestyle outside of exercise, formal exercise is more important. Some people wear pedometers to try to get in 10,000 (?) steps a day---through regular activities or through a mix of regular activities and formal exercise).
HTH!