Eye contact - American culture; what about a place like CMU - do we assume they’re used to the culture shock?  Same level - story about Admiral Reason

Gestures - make sure your gestures match what you’re saying; videotaping and asking friends and relatives to help you identify annoying habits.  Try this - shake your head in disagreement when a friend is talking to you about something that is totally uncontroversial

Posture -  Trunk lean.  Avoid slumping, rigidity, crossed arms.

Don’t blow a good open question by immediately following it with a closed one.  Pause and give your patron time to think.

Facial expression and tone of voice - if you’re a caring individual trying to do your job then just be yourself