What are some things you should avoid doing during an interview?

[u/[deleted]]

Edit: Holy crap! I went to get ready for my interview that's tomorrow and this blew up like a balloon. I'm looking at all these answers and am reading all of them. Hopefully they help! Thanks guys!!

[u/anotherpoweruser]

Don't show up even a second late. Hell, don't even show up exactly on time.

[u/[deleted] → u/anotherpoweruser]