#1) low carb diet and cardio.
#2) There are any number of supplements that accelerate fat burning, Two of the best, I think, are Species Somalyze and Gaspari Mitotropin.
Also, take N-Acetyl L-Carnitine.
#3) Beyond diet, if you are interested in what competitive bodybuilders really do: take T-3 ... but very carefully! Most users vary the dosage daily from .125mcg up to .75mcg and back down again. And don't run it for more than a few weeks. It is very damaging to your thryoid if you screw up, so 1) google it and read as much as you about its use on the bodybuilding forums 2) if you decide to use it, think 3 times at least before you finally take it.
#4) Bodybuilders also use GH for it's lipolytic capabilities at 2 - 4 iu per day, but that is a very expensive route and the results take a couple of weeks for you to see. GH for just a few weeks at a low dose will not cause any side effects. Along that line, there are also what are called "GH fragments", i.e., CJC-1275 and also 176-191. They are cheaper than GH, too.
"The HGH Fragment is a modified form (Figure 1) of amino acids 176-191 at the C-terminal region of growth hormone.
Investigators at Monash University discovered that the fat-reducing effects of GH appear to be controlled by a small region near one end of the GH molecule. This region, which consists of amino acids 176-191, is less than 10% of the total size of the GH molecule and appears to have no effect on growth or insulin resistance. It works by mimicking the way natural hGH regulates fat metabolism but without the adverse effects on blood sugar or growth that is seen with unmodified hGH. Like unmodified GH, the HGH fragment 176-191 stimulates lipolysis and inhibits lipogenesis both in laboratory testing and in animals and humans. The HGH fragment does not appear to affect appetite.
In laboratory tests on fat cells from rodents, pigs, dogs, and humans, the HGH fragment released fat specifically from obese fat cells but not from lean ones, reduced new fat accumulation in all fat cells, enhanced the burning of fat. In rodents (rats and mice), HGH fragment reduced body fat in obese animals but, enhanced fat burning without changing food consumption or inducing growth (as it does not increase IGF levels) or any other unwanted hGH effect."