I've been itching to start drawing again for a while, but have finally gotten off my ass and did it this week (after a couple false starts over the past few months, that I quickly abandoned).
My goal is to sketch a character from a show I'm watching, at least once a week. No hard-and-fast rules, or anything. Just whoever strikes my fancy. For my first I did Joan from Mad Men, which just started up its new season a couple weeks ago, and is as strong as ever, so far anyway. It's not a striking likeness to the (incredible beauty that is the) actress, but I still liked the picture enough on its own merits. My excuse is that I am doing the character and not the actor, but whatever, it turned out to be a nice little sketch anyway. Next maybe I'll do someone from Game of Thrones.
This is still Sketchbook Pro (now on my Nexus 7, not my iPhone, so I get a couple more inches of room). Pretty much just used the pencil and marker tools (and lots of erasing). I have never really worked with color much so this was a good learning experience.
enjoy.