[Cry Me A River]

I think that in SNG's the most important read, by far is the bubble read. Particularly, "too tight" or "too loose", this is really the case with the big stacks and little stacks - Big stacks on the bubble are often either "Fold into the money" or "bully" and you need to adjust your approach accordingly. Similarily, the short stack is either "waiting patiently to blind out or get a premium hand" or "push, push, push". While most mid stacks will be playing too tight, you need to know which are capable of a steal and which will only make a move with a real hand.

You really need to assess your stealing opportunities. It's one thing to say "push any 2" when you're UTG with 5xBB and the BB is going up next hand but you need to know when you can steal with any2 when you're an average stack with 12xBB.