#1. Quality over quantity
It's all about getting the proper muscles to do the work and making sure that you aren't using muscles that allow you to cheat. It isn't about setting a new world record for repetitions and it isn't about getting through your assigned reps just so you can be done with them. If you do them wrong, there really isn't that much of a point to doing them at all.
#2. Sets and reps
Breaking your exercise routines into sets of repetitions will help you get more out of exercising than just trying to do as many as you can until you get tired. You should do sets of equal repetitions. Rest in between each set for about a minute, then continue on to the next set of reps. What this allows you do is to work your muscles in a more complete fashion than you otherwise would.

#3. Weight and strength training
A good way to help burn excess fat faster is through weight training. This works because by building more muscle, your body will require more energy to maintain your muscle mass. This means that as long as you don't also increase your calorie intake, your body will look elsewhere to get the calories that it needs. And that means that it will take the excess fat from you body and stomach area. So you should build muscle so as to raise your metabolism in order to lose weight and burn fat naturally.
#4. Do your exercises slowly and with control
Don't perform your stomach exercises quickly just to get through them. If you do each move slower and with full control you will achieve far better results. Even if doing them slower means that you have to do fewer reps, it will be far more useful to you than just rushing through them.
#5. Don't overdo or under-do exercises
Keep aware of how often you workout. If you try and do a heavy exercise routine every day of the week, that will probably be too much for your body. It won't allow your muscles enough