Some players will attempt to dominate early. The SNG also all depends on the time between blind levels. Your strategy must equal the SNG concept.
15 minute blinds, watch the range played by others and be tight aggressive.
10 minute blinds, dont be so tight.
3-5 minute blinds (turbos) an ace is always an ace, a pair is always a pair. Avoid placing too much strength on a KQ or KJ or QJ, A2 22 anything beats it.
Find your comfort zone and watch the players. Forget its a SNG, remember the players.
Thats the way I do it if that helps. No 2 SNG's are the same.
Steve