re: Poker & Live play
A lot depends on what limit you are playing at. In low limit games, ditch the sunglasses...you look like a fool...makes everyone else think that you think you are a pro...and they know better. At higher limits, sunglasses are more accepted.
As far as tells go, concentrate on finding tells in the best players at the table. Particularly the tight aggressive and loose aggressive players. It takes time to spot tells, so like Cowboy said, don't be surprised that you don't find many until you play with someone a few times. I tend to concentrate on hand movements, betting patterns, and facial expressions. At lower limits, players can be so loose that tells may not be as reliable as they are at higher limits.