1. Hit the right target, get the 1 that is targetted by your teammate or easiest to kill. For example :
which 1 is easier to kill ?
this
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=EasyTarget.jpg
or This ?
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=WrongTarget.jpg

2. Defending, You're not there to show off your good looks or your sexy body. Find a place to look at the field and your flag from a safe distance, just stall until reinforcement arrive while u shout for your friends to come.

Right
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=RIGHT.jpg
who said you need to be a rogue to be invisible ?

Wrong
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=WRONGPOSITION.jpg

3. DO IT FROM BEHIND ! basically its just like #2, do it somewhere far away or out of sight so they won't notice u.
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=FROMBEHIND.jpg

4. Piss of your enemies at the right time and place, don't charge and die in honor only to make you feel awesome like your favourite character from rpg movies.

For example, when you see their reinforcement come. frost nova or do any shit that make them stop in the place and spam your emote to mock them. This is the common outcome.
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=BLOCKING.jpg

But resulting in this
https://s624.photobucket.com/albums/tt326/liongzhaoxin/PVP%20TIPS/?action=view¤t=BLOCKING_RESULT.jpg

any useful addition are welcomed.