Don't call us, we'll call you
Not realising that an interview is a two way discussion. It’s an opportunity for you to find out whether the job is a good match for you, not just an interrogation.
Ask what challenges the team face, ask what the departments strategy for the next 12 months is, ask what an average day will look like etc. You’ll appear more interested, you’ll find out more, and it also helps to turn a formal interview into more of an informal chat which helps with nerves. (dancingcroc)
Turn up early, but not too early. Basically aim to get there 30 minutes before the interview, this is your buffer, then once you’ve seen you are in the right place get a coffee and chill for 20 minutes. Walk in 10 minutes before the interview. (One_Day_I_Will_Stop)
In this case, better in than out
I was sitting in on an interview panels one time and they guy being interviewed shifted position in the seat and did a huge fart. And I mean huge. It was a massive, window rattling elephant size fart. He looked shocked and all he could do was say ‘oops, better out than in’. I, being childish, laughed out loud, took some time to regain my composure and then spent the rest of the interview giggling. He didn’t get the job (although not because of the fart) and I got told off by my boss for ‘acting unprofessionally’. (RicoDredd)