Lol, i thought about this once (its sad..... i know)
I would act all normal, and if someone got into a fight with me, i would let them punch me, but not move when they did, then start a sadistic laugh and hold my head in one hand, then start screaming and the ground around me would tear up, and i would be a nice SSJ. I would walk towards the person, and where my feet stood would be charred ground. If they punched me i would teleport away, then appear behind them, theronwards i would basically make a complete joke out of them till they pee their pants, laugh, go un SSJ and walk off like nothing happened, sweeeeet!
Apart from that i would join the south african police force (one of the most dagerous jobs in the world) and go fight the gangs, they are bad here, they shoot children and stuff up, i hate them. I would wait at the place a gangfight was rumoured to happen, and just look at them like some mesterious kinda rei (from evangelion) kinda way. I would then go SSJ and kick the **** out of them, breaking their kneecaps. But i would not kill them, because it would make me just as bad as they are. My momma raised me to respect human life
Apart from that i would use my powers to solve conflicts around the world and for fame and fortune, and babes, of course !!!!!!!