I tried the original yohimburn and it didn't do shit. The new mixes they offer are just way too expensive. I have some lipoderm-ultra on the way that I am going to try out. I heard that skulpt isn't any good either plus it stains the skin.
About making your own, I remember someone who said they tried it and liked it. They used an nsaid like bengay to help penetrate, then you could throw in whatever else you like.
Yohimbine HCL, caffeine, and ALCAR would be good.