DO:Explore the world around you. Glass puts you more in control of your technology and frees you to look up and engage with the world around you rather than look down and be distracted from it. Have a hangout with your friends, get walking directions to a fantastic new restaurant, or get an update on that delayed flight.
Take advantage of the Glass voice commands. Glass can free your hands up to do other things like golfing, cooking, or juggling flaming torches while balancing on a beach ball (but also see Don'ts #2). This is great for looking up how many ounces in a cup while you cook, or taking a one-of-a-kind photo from your unique perspective.
Ask for permission. Standing alone in the corner of a room staring at people while recording them through Glass is not going to win you any friends (see Don'ts #4). The Glass camera function is no different from a cell phone so behave as you would with your phone and ask permission before taking photos or videos of others.