Aight , I am pretty sure most people know this but for the ones that doesn't know, this can just make the difference between getting raped in PvP and pwnin som1 face.
This only work for melee class, the best class for this are / Ret Pally / Enchancement Shammy / Warrior , in that order.
Alright so if you want to make this really effective you need a slow 2h weapon, between 3.50 - 3.80 speed.
What you do is : click on 'Attack' so your weapon will swing ( that's not all don't worry rofl ) , once it swinged , it will only swing again in 3.50-3.80 seconds depending on your weapon speed.
So what you do is run behind the guy you are fighting (work better if you are fighting a melee class ) so he cannot hit you ( you can't hit him either but who care, your next swing is only in 3.50-3.80 seconds ) after 3 sec you turn back and run to him, since you are in ' attack mod ' once you reached him you will swing instantly since the 3.50-3.80 sec delay between swing is done.
You can repeat this as many time as you want in a fight.
Why is this suppose to be good.
Well if you swing before your oppenent and then run behind him he will get 0 attack off while you got 1 then you come back and hit him again , he will prolly get 1 attack off too but the ratio is 2-1 for you.
Also if you are fighting a rogue , we know that their attack speed is faster cause of their instant attack and 1h weapon speed. Well if you can avoid them hitting you while you can't hit them ( when your swing is on Delay timers - 3.50-3.80 seconds - ) and you only allow them to hit you while you instant swing them, you will sure rape them. They would usually do alot of dammage during that 3.50-3.80 second but since you are out of range they cannot deal any dammage and doing this doesn't affect YOUR Dammage done.
This might seems easy to do but it is not so ez , you will need some practice and like I said this is easier to do with Pally cause of Blessing of freedom which allow you to move all around with out being slowed.
Anyways enjoy
EDIT- If you don't understand something feel free to tell me , english is not my main language so eh just tell me I will re-explain it in better english I guess lolz