Some of the most well known people I know never assume people they talk to know who they are. Sequoia Capital partner Roelof Botha, for example, introduces himself to me every time I see him, and asks if now is a good time to talk. I’ve known him since 2006, and it’s far from necessary. But I always appreciate how polite he is. Want to be like Roelof someday? A good start is basic business etiquette. Just because someone can’t register your face, name and workplace in less than the second it takes for you to say hello to them doesn’t mean they don’t want to help you out. Just help to avoid that awkward moment by giving them all the information they need. And then watch body language for your cue to wrap things up.
Excellent article by Michael Arrington on how good manners never go out of style: Greetings!