The best way is use engine to brake.
but not everyone can do that depends on the transmission you have. Plus this still wont guarantee that you wont slip.
I forgot about engine braking lol. Yea I also did an engine brake as well. I did it in my automatic. It's actually harder on a stick shift since there is a lot of stuff going on with manuals and you have to be conscious of how you ease off the clutch.
As for pumping my accel, it was a combination of light taps to higher revs. I tapped to get the car moving in the direction I wanted and used higher revs to initiate more abrupt direction changes.
I have a front wheel drive by the way.