There is a lot of bad advice on this thread. Who would recommend ephedrine based products? First of all, they are illegal in a lot of countries, obviously, without a prescription. However, the biggest concern about these products if the fact that they may cause heart problems, especially for the people who aren't aware of the fact that they have a heart problem.
L-carnitine and a regular fat burner will do the trick. You can add yohimbe too, but there is no point to take ephedrine, especially if you don't plan to compete in a fitness contest.