If you haven't already, I also recommened playing a good number of HU SNGs. Most of the time you're pushing HU in an SNG anyway, but there are some subtelties to the game you can apply when your opponent incorrectly calls the SB and gives you a free flop.

There were also some really fun three-person, winner take all SNGS on Royal Vegas when I started playing. Those were like taking a class on when to fold TPTK and bottom two pair.