I'd love to time travel, but time traveling to the past could be some risky business. The simplest thing you could do could change everything about the world. Not to mention it's dangerous, full of diseases (or you could give diseases to other who haven't domesticated animals and gotten such diseases yet- which would make some contintent have epidemics, and then world history could be altered forever), and people could potentially think you were using witch craft and kill you. Not to mention, there are a lot of people who would just kill you anyways, like the cannibals of New Guinea. :D However, the prospect of becoming a God in said cultures would be neat, or taking an artifact from the time and selling it presently for millions of dollars.
But, yeah, I'd probably go to the future, see what my life was like and how I could potentially change it to be better off, and then take some invention from the future, copyright it, and make a lot of money. \o/