limiter launch ftw but still use the handbrake, ive seen a few breakages from just dropping clutch, when using the handbrake u take any 'slack' out of your driveline, also helps u come onto boost before launching, so as said before line up, pull on handbrake keeping hand on the handbrake slowly rev and release clutch till you feel it start to bite, then foot flat drop handbrake n clutch!!