I got my supra at 17 as well, within 6 months of having my license and supra I tried to take a 90 degree turn at 60mph and flew into a ditch with 5 people stuffed in the car. Almost killed us all. I've been driving my supra for 13 years now and still could use improvement, I participate in drag and drift events and go through the desert at night rolling 130 at least, it all goes to experiance. I am sure that all these people just don't want to see you kill yourself because you don't know how to control your burnout and stupidity yet. That being said, 4500rpm and drop the clutch steer away from your turn and use your brakes. Practice away from your friends a couple times so you don't look like a dumbass when you stall.