I´d play real life GTA. Drive around with my car crashing everything that gets into my way!
Get some weapons, wreck havoc. Then I´d go to the girl whom I have loved all my life and tell her that it´s my last day and that I even once want to kiss her before I´ll be gone.
(I messed up my only chance in the past and now she doesn´t have any interst in me, so...)
If she refuses, I´d probably rape her. -.-":no hehe
Na, just kidding. But I´d kill a few ppl that harmed me in the past.
And I´d save some time to write some memoirs