Wait! Thought of one. Put me back to September 12, 2000; that gives me a year to figure out how to convince the FBI how to thwart the 9/11 attacks. (Or a few weeks to convince my wife I'm not nuts, then start working on the FBI.) Hundreds of thousands of lives saved (9/11 attacks + Afghanistan War + Iraq War + numerous War On Terror spinoffs) for some lost income on my part while I'm off work — sounds good to me.

Ooh ooh ooh! Do I get to take back the winning lottery numbers for late September 2000? This could be a win/win!