This weekend I had my first class of Kung Fu, tough it seems pretty cool, it's for tuff people. Hope that in the future I can smash some bullies' head. *just kidding :-P
Sketchbook Mobile is a great drawing app for smartphone, I call it my Miniphotoshop, lol. You can have it a great variety of brushes in it, so this is a great way to sketch in it.