I don't
I have made about 10 beats though. Not only did I use Fruity Loops and Reason, but I don't even own a keyboard. i used ALL sampled .wav files that I ripped from any of my CD's
here's how i mixed the cd down. export it from FL to a .wav file, take it out to my car (this is when i had a system), played it, decided how much i needed to tweek the volumes of the drums, snares,, bassline, highs, etc, got back on my computer, repeat process as necessary....
a good 2-3 of them actually didn't sound bad