With SNGs (assuming an average table), I'm the opposite of most people and play very tight at the beginning when the blinds are small and progressively loosen up as the stakes get higher. The benefit is that I always have a decent amount of chips to play when I "wake up"
and get in the action; players who are observant think I have to have something if I'm playing the hand. When the blinds go up, people play tighter and I steal a lot of pots. If I have one, I'll show a premium hand if all fold which reinforces my "tight" image. Works at small stakes, anyway.....