Gixxerlad, it takes practice practice practice. But basically you have to work the clutch and throttle together. You want to kind of snap slide out the clutch and roll on the throttle at the same time. You have to balance launching hard with keeping the front end down. You do that by feathering the clutch if it starts to wheelie too much. If you lower the rear of the bike with adjustable links and strap the front end down it helps a whole lot on launching hard. Basically it lowers the center of gravity making the bike less prone to wheelie.
Watch this video, its Norm Jackson, he is a pretty damn good rider and he gets the 10R down the track real good.. He has good form and works the clutch very well..
http://dontbescaredracing.com/video/zx10r_nj.wmv
The 2nd video is Ryan Schnitz on a ZX6R. If you watch his throttle hand he snaps it pretty much wide open right as he releases the clutch. Keep in mind both these guys are pro's especially Ryan, and that ZX6R is set up specifically for drag racing..
http://dontbescaredracing.com/video/...77_137_zx6.wmv