Basic Tricks
These techniques are easy, but useful. I'll tell you how to do and counter each one.
Feinting (Spamming)
Useful Against: Noobs
How To: To feint, simply click to attack, but before you swing, right click and cancel your attack, and repeat until you see your enemy mess up, then give him an unexpected attack. Attack in unexpected directions and give him an unconstant attack pattern.
Counter: Quick reaction. Follow every move and attack when you see him getting too cocky. Also, a successful hold and chamber would do the trick.
Spinning
Useful Against: Noobs, Groups
How To: Instead of attacking him directly, spin around while feinting or holding your attack and then swing. Do it in an unconstant pattern. Don't get too cocky. Watch your back.
Counter: Get close to him so he can't spin and hit you. If he isn't paying attention, hit him in the back. A successful chamber or hold would work also.