Practice is your friend. Also you need to know your goals....
When I am going for best et, I launch at 2500-2700 RPM.
When I am going for consistency and RT, I launch right at 2200 RPM.
96 v8 4.6 explorer, kooks headers, off road x, magnaflow mufflers, cl tb/plenum, lmaf, gt tube, xcal tune, alum shaft, 3800 dirty dog converter, darrin trans, 373 gears, hoosier slicks on fanblades, pbr brakes, Skinnies on front, No PS or AC, Aeromotive EWP, major weight removal (3380 LBS), 12.78 OLD COMBO.