Well, since the bulk of people here would be screwing/jerking off and killing people, i'd be avoiding most of that, then [realistically]
1) Get my life savings out of the bank (~$14,000usd), throw a huge boozey delicious banquet for all the homeless i know in the city, discussing our lives and what we'll miss most about not having it soon.
2) With the remaining money (~$8,000) get all the musicians and artists i know together to play a 'fairwell reality' gig at Panacea or St. Andrews Hall (both doable, realistically... the owners are friends).
3) Wander around and avoid bullets and dirty people, probably eat some sweet sandwiches. Revel in the chaos surrounding me, eventually coming to a decision as to whether there really is some sort of creator or not.
To be honest, I kinda hope this happens someday... it sounds fatalistic and all, and maybe i watch the news too much, but Earth's only hope for survival does seem to be to hit the reset button on all life and start over.