What car do you have? fwd/rwd/4wd? what power/weight?
I wouldn't use 2nd gear, you could possibly kill your clutch or gearbox.
If you get to the start line 1st it can give you a few extra seconds to compose yourself, rather than rush if you're 2nd.

Reaction times don't add to your 1/4m time so go when you're ready, don't rush and end up wasting a run.
try shallow staging.
http://www.modernracer.com/tips/dragracingbasics.html