First of all:
Find out what the hell is wrong with my shoulder. Seriously, I get muscle strains while I sleep
Watch all episodes of Legend of the Galactic Heroes a.k.a. probably the best space opera ever made

Then, in no particular order:
Visit Pripyat, Hiroshima, Disney World and ComicCon
Ride the Siberian express and take a trip down Route 66
Discover medicine to cure stupidity and take some "just in case"
Eradicate mosquitoes once and for all (and make way to giant, fire-breathing ants)
Make agnostic-pantheism world's leading religion (or just agnosticism as whole, I don't really care)
Climb a really tall mountain
Get over my radiophobia and then leave this Earth behind, if only for a little while
Pass down my genetic information in some unorthodox way
Get all those cool T-shirts I want
Have fun

And if there's enough time left:
Conquer the sea of stars.

And if I'm still alive after that:
Find a way to morph myself into a giant worm or discover another source of longevity or even immortality, so I have time to read everything I want.