weight loss is simple, its all about what you and mainly about self control. You need to limit yourself on sugar intake. If anything, try eating desert only once or twice a week. Next, try and limit how many calories you eat per day. If you are active and play sports and what not, limit yourself to 2000-3000 calories per day. Also, try and lay off junk food and fast food. although it is tasty, avoid it. Try a nice snack like celery and peanut butter. Sounds gross, but it tastes good and fills you up. Lastly, maybe exercise once or twice a week. Try just jogging for 15-30 mins and that should help a lot.
Although exercise is the easiest way to lose weight, a healthy diet is too. This doesnt mean not eating in any way. It means eating less portions and of better foods. Dont eat processed food like greasy chips, instead have celery and peanut butter, or something of greater nutritional value. Eating less and eating right, you should see results within the first week if not faster.
do crunches for ur stomach. and exercise as much as you can.PS: drinking lots of water helps lose weight a lot faster. and try to consume 1500 calories or less in a day. That should give you amazing results