I don't know exactly what I'd do for the year, but I know I'd spend a lot of time traveling to see places I've been meaning to go see and visiting people* I've meaning to visit (I'll kiss some, punch some and hump another on the leg(you know who you are)).
And I'll do all this with somebody I love, my soul-mate.
On a practical level I kinda like
skunk's friend's idea of the un-repayable loan. I'd take the loan and as many credit cards as they're stoopid enough to issue. Before I run up any debt I'd transfer all my assets to loved ones and when I'm gone the credit card companies and banks can all argue over how to divvy up my estate of zero.
I know what I'll do on my last day after I've said goodbye to all my loved ones. I'm gonna go to my local garage (who screwed me over on a Peugeot a couple of years back) take a Bentley Continental GTC out for a test drive and launch it, and me, off a cliff at 150mph, all streamed to the web!
One last thing I'd spend time doing is putting down on record for my loved ones all the things I wish I could tell them now but can't.
*EDIT: Thinking about it there's an inordinate number of MacRumorers on that list!