You can eat carbs, you just have to figure out how much,what kind(complex vs. simple) when to consume,ect... If you eliminate them completely you willl loose some muscle and you dont' want that.
I just started using adipokinetics after years of Ripped Fuel--Adipokinetics smokes any other fat burner on the market. Great pump and makes me sweat like a mofo.
Cardio and diet, but if you want to use drugs without the hard stuff like cardio try e/c/a. I find clen only works well if your already lean(ish).
Bouncer