Waaay OT - Workaholic seeks advice on required day off

My organization's Fiscal Year '12-'13 ends June 30th.  Over the course of the past year, I have been extremely busy and as a result, did a really poor job of using my PTO.  I find myself stuck with 2 extra days I have to use (today and tomorrow) or else I'll lose them come July 1st. 

The first half of today has been excruciating.  I have no idea what I'm supposed to be doing on a weekday when I'm not at work (and when my GF and other friends are all working).  I beg you, MGoPopulous, give me some ideas so I don't jump off my balcony out of boredom. 

A little background may help.  I live in Phoenix.  It's 112 today so my desire is to keep it indoors, especially since I golfed and got a wicked burn this weekend.  I don't drink alone.  It's been so long since I've been unemployed that I can't remember how to pass time on my own.  So those things considered, help!!!

Edit:  Thanks to all for your great suggestions!  I don't have enough time to do everything suggested, but that's better than having too much time with no ideas!  Even those of you who contributed snark, I appreciate that - it's part of what makes this place so wonderful!