Tentatively, SuperJoshua.com. Primarily, my working through the book, The Natural Way to Draw, by Kimon Nicolaïdes.
Only one, today. Plenty, I assure you. I actually spent an hour on this one. Yes, I stared at a curtain for over an hour. While listening to the Tyrian 2000 soundtrack (which you can get for free at GOG.com [Yes, I felt like plugging an excellent site]). Anyway, after a day break I'm guessing something was percolating in me, because I found this drawing to be a little more skillful than my previous three.
Dude, this soundtrack really is quite nice. Doodilydoodilydoodilydoodily