Ever done this?
Want to create some observational skills while playing SNG's (other games too)? Try taping a piece of paper over your whole cards, and playing the entire tourney this way.
You'll be amazed at the skillz you'll develop, and how often you actually allow YOUR CARDS to be the determining factor in your decision making, rather than current/past actions of oppnts, and their holdings.
It's like closing your eyes for an extended period of time while your outside. You hear things you never knew existed!
By covering my whole cards, I've developed senses I didn't know were there, and noticed actions I never have before. I can "feel" opponents' weakness and strength better than ever before (which is soo critical online-- betting patterns alone, aren't enough. You definitely can FEEL, while playing online).
It's tough at first, but after awhile...