Whatever you do --- DON'T BLINK!
I've only been through two different ones and got the job both times. Confidence is king and look them in the eye when speaking to them.
Good luck!
For me, before there was the Thin Blue Line, there was the Blood Stripe! Semper Fi!
Our fear reminds us that we are not God, our faith reminds us that He is!
**DISCLAIMER** I'm not a current LEO, but have six years experience with two city PD's in NC and TX as a sworn officer. I'm in the process of returning to LEO work ASAP.