Body Language

vertically. Be careful not to shake or nod your head in the wrong places, which would show agreement.
Touch: apart from maybe a handshake, no touching.
You can also use height – you can seat them whilst you remain standing – and don't forget there is also the anchoring you read about earlier. As a manager you should have ample opportunity to set up anchors in your staff both positive and negative.

places to show you are listening.
Head tilt: tilt your head slightly to one side as you listen.
Touch: if appropriate show caring with a touch to back of hand, forearm, upper arm or shoulder.

Discipline
Unfortunately, life as a manager isn't always about showing your caring side. Sometimes it's a case of laying down the law. If staff don't follow the rules then you as their line manager will also have to handle disciplinary procedures, issue warnings and even handle dismissals.
Playing the role of disciplinarian
You can use body language to reinforce your message, so that what your body says is consistent with your words. This way, you will get your message across more clearly, and be taken more seriously.
Seating: in this instance, barriers are good. Set up the room so that you have barriers. A desk is always good, and make sure their chair is smaller than yours with no arm rests. If you have arm rests sit with your elbows out.
Eye contact: instead of your normal eye contact keep it to a minimum. (If you really need to apply some pressure, look at a spot just above the bridge of their nose or on their forehead. This has an amazing effect at making people pay attention. This technique is used a lot in hypnosis.)
Facial expression: serious, no smiles, keep your lips together when you're not speaking.
Head angle: keep it straight both horizontally and vertical