I have a "full draft" of my thesis, and I'm now in the process of (trying to!!) revise it. I wanted to send what I had as a writing sample, but because of the varying page limits, I used my chapter one, cut down to size a bit. That was what I felt comfortable with, anyway... chapter two is still really rough, and adcomms would've been offended if I even sent that part lol. So I took the "safe route". As far as actually working on said thesis: HA! I've basically accepted that it's not happening for real until I get some responses from applications.
I hope you guys are having more luck on working than I am!