1. Get your diet straight, diet diet diet, make sure EVERYTHING is in check most importantly refined sugars and saturated fat intake you have for the day, and also make sure you're keeping tabs on your High GI carbs, stick to as Low GI as possible.
2. Once you've done that, forget slow paced/long duration cardio ... Find something that will get your heart rate raised nicely...High Intensity basically. You need your HGH levels to be raised significantly if you want to experience fat loss, especially in the problem areas like Abs and waist. HGH seems like its a little under rated for burning fat around places it seems to me?
3. Supplements come last, diet and training first, one supplement you can try which can help get you some decent fat loss is yohimbine-hcl. Dont buy just yombine extract or bark powder, make sure its the Yohimbine-Hcl. should come in 2.5mg or 5mg tabs....5mg should be all you need daily, try not to go over 7.5mg for the first 2 weeks, just keep doseage low and see how it treats you.
All the best