Hey Peter, good luck with your quest of becoming a winning player
I can give you a few tips, even tho I dont play Sng, but you should buy Pokertracker or Holdemmanager, start reviewing your hands, post hands on 2+2 and play a bunch. If you do have more money behind I would try to get a membership on a coachingsite also. There are many good and Im sure you will improve your game very much.
GL