I drag race myself so, I will tell you what I know. One of the main things is to get a good reaction time. You will have to be able to dial in right to. Most of the time the key to winning is concentration.
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To be able to think faster than you can re-act and drive on instinct and pre empt what the car will do before it knows. Nerves of steel also help and physical fitness (close to world class athlete is advised!)
good control and co-ordination. you also need a good feel for the one you're driving. each one is very different. there are places that teach people this. good luck!