Originally posted by MDS_Geist:
Cut your caloric intake by a few hundred calories a day. If you're eating 2,000 calories a day, try cutting down to 1,700. But do it the smart way and cut out fats and sugars rather than protein. Cut out simple carbs rather than complex cards, etc. But don't starve yourself - that makes you lose muscle and is really extremely dangerous. Your body will also go into starvation mode and begin storing fat.
Increase your activity level. If you're currently sedentary start by adding in 20-30 minutes of cardio 2-3 times per week as your body is able to handle. Jumping rope is great, but you may find it harder than you expect. Jogging and swimming are two good ways to start. Begin some light weights as well to increase your muscle mass.
Crunches, reverse crunches and other ab exercises are good, make sure you balance them with back exercises also. Do NOT pull on your neck when you do them. Bear in mind that you can't spot reduce and need to reduce your fat in order to to see the muscles beneath.