I would chose not to return, instead, I'd spend all of my time practicing various instruments so that I may write and record hit songs that haven't been recorded yet. When I feel I have left a decent legacy, I'd pack my things and go on to the present, claim that I had invented time travel, and become the most interesting man in the world.
It occurs to me that I gave the wrong answer, and seeing you post means I must post the correct answer.
Ahem, I would go back with Insom and we would save John Lennon. Then we would halt Christianity's advancement long enough for the Romans to create machines. Then we'd enjoy Steampunk Victorians for a bit.
That answer is far more interesting.
Off the top of my head, I would travel back in time (and location) to the 5th Of November 19something and help out that chap who wanted to blow up the British parliment. I could give him a heads up about the trap.