If I had just been told I have a day to live and after that could die any second, here's some short and sweet stuff I would do in that day:

Smoke D*T
Have KFC for lunch then some tasty crustaceans as my last meal
Ride a quad bike around heritage listed buildings and gardens
Figure out why the millennium decade sucked as compared to what the "ties" decades gave society and why I wasn't born in the summer of love.
Have chaos rule the world for an hour of that day (must DESTROY Tom and Mark Zuckerberg!)
Play xbox for an hour of that day. YES! Made it to the next level! Shit, that just turned into three.
Scream at something that isn't tangible that some people call "GOD" as to why I'm about to die, but in reality actually shout to a wall and not actually care
Try one last time to get Rob Zombie to marry me
Oh dam, he said no to a dying girl? Then I'd go watch House of 1000 Corpses and cry myself to nap. For about half an hour. Must be fresh for the afterlife.
Listen to Nirvana in anticipation that I was about to meet the ultimate awesome and get him to marry me
Make sure I die at a bush doof in the arms of my obsession

Things I DON'T NEED TO DO before I die since i've already done them or don't want to:

Decide if it's more likely that i'm going to heaven or hell (because I already realised on a mushroom trip that hell is on earth as I sat in a dark alley in Enmore)
Go to Disneyland (I haven't been and Disney doesn't need anymore money.)
Go trolling and read exciting forum fights.
Create my own anti-religion, non-religion (Noigler)
Ponder the meaning of life on my death bed (not only will it take up too much of my dear time, but I'm going to find out in about 24 hours. Who cares anyway? We're all just useless earth prawns (yes, the scavengers) in a mega-galaxy upon boundless universes caught up in an inestimable contemplation about something that will end in about 70 years - a measurement not to bother about in the grand scale of the cosmos.
Be philosophical.