Famous things to say

If you're about to meet someone famous, or at least important to you, you may think of interesting things to say before you meet, things that might elicit more interaction than simply "Nice to meet you."However, when you actually come face to face your mind may go blank and you may end up searching for something to say.

Make sure you write those interesting things down while you're not feeling any pressure.

Guess/Answer

If someone has something to tell you, and they want you to guess what it is, try not to guess it correctly. You don't win anything by doing so, and instead only deflate the person's enthusiasm for telling you what it is.

Friend you've never met

If you are heading to a meeting or social gathering, assume every strange also walking the same direction is heading there as well. Hold the door open, be pleasant in elevators, because if they are also part of the group to which you're heading and you're cold, obnoxious, or rude to them, the entirety of the event will be awkward.