Let me make this short and sweet.
When the light turns green, GO!!!! My friend Stephen often rants about this very subject. He says, and I wholeheartedly agree, that if everyone accelerated when the light turned green, three times as many cars could go through an intersection when the light is actually green. Why does it take a full ten second count to go if you are three or four cars back. You are sitting there staring at a green light and also staring at the car in front of you, brake lights on and not moving. Why?! Precision drivers can do it. Why can't we?!
Pay attention. Green light. Go. Simple.