Have you ever tried doing the ECA stack? ECA stands for Ephedrine, Caffeine and Asprin.
The main idea is that when all three items are taken at the same time then they provide a synergetic affect that allows you to burn more calories and therefore increase your chances of burning more fat.
Wikipedia has a good definition.
2-3 times a day you would take about 20mg of Ephedrine; 200mg of caffeine and about 81mg of asprin (baby asprin).
This is the cheaper alternative than buying an off the shelf product like Hydroxycut which no longer has ephedrine.