Update my facebook status with "LOL I'm gonna die in 30 minutes!!1".
I'd then make a thread on 4chan with something epic to look out for in the news, and sure enough it would be a big deal in a day or two. Something along the lines of "Watch the news, some dude's gonna strangle 3 people to death in a grocery store before his heart stops". Sure enough I'll be the one to do it, and be remembered forever on 4chan, and through my facebook status.