ok. that thing that i said was for me, but now to help the world. i would get a team, and go to the middle ages, help caveman discover fire, cook, and things like that, i would go a litle bit to the future and give better medicines, teach things that the needed thousands of years to discover.
i would go forward one day in time and see the lottery numbers and write them down then go back in time and buy those lottery tickets and win millions or billions of dollars
I would go to the past and save the world from myself, because I would have already gone back to take it over. So I would be saving the world by stopping myself, I think...............