>Stay calm and composed.

Ironically, reading this makes me hyperaware.

>Sound enthusiastic! Speak with a smile and you will naturally sound more engaging.

In my experience, some people force this and it comes off a bit creepy. I've had better luck not thinking about this.

IMHO don't treat the social side the same way you treat the technical side (i.e. preparation similar to homework). The social side should not be overly deliberate. Don't overthink it, just be polite.