For an optimal time, have minimal fuel in the car, and take out anything that you can - carpets, sub boxes etc. check tyre pressures are even and not too high.
i'd go for 4,000 rpm, hold clutch on biting point
don't slip the clutch
dont lift too much if the fronts spin, some people take their foot off! 1/2cm to a cm for 1/2 to 1 sec should do it.
As the rev needle hits red, change gear. If you hit the limiter, change gear.
make sure you are not giving it full power until the clutch is fully up.
A little clutch buning smell is ok, you're making it work hard!
Don't accidentally put it in reverse on the line. i saw someone do this at inters in about 98 and he flew backwards and nearly took out a marshal. funniest thing i ever saw!