Are you in such a situation- you make a Warlock but do not know how to play it in PVP? If that is in case, you should try to follow a Warlock PVP guide, which you can find some strategies to use in different combat situations along with tips on how to best train your character, what gear to get and any other important information you may need.
   Leveling Warlock is very fun for those who do well in PVE. When it comes to PVP, they never know which class they will fight or what spec they will have. They won't have time to make a plan, and even if they do make one, the chances of encountering the exact same situations are extremely slim.
   In PVP, the role of Warlocks is quite simple that they load the enemy with damage over time and then just uses the fear spell on them until they die. They can drain the mana off enemy targets and regenerate their own health with curses. If you combine the right skills, the WL can be very dangerous to enemy casters due to their Felhunter, which is a pet. The fact is that a well trained WL can pretty much kill anything as long as he is played wisely. As you might think, he also has weaknesses. The most important one is that he is a caster, so he can die very fast if you are trained the wrong way and do not play your class as intended. You will find an abundance of ways with which you can avoid getting hammered down by enemy tanks all the time in Warlock PVP guide. Likewise you will find important information about the spells and classes that give you a hard time in PVP. Being a mana user you are vulnerable to mana drains. If you encounter classes like the Paladin or Priest which can cure your DOTs and dispel your curses, then you are in big trouble. In such a guide, you will find information on the spells that can neutralize you and information such as cooldowns so you can you can time your attacks perfectly.
   A Warlock should concentrate more on killing enemies than trying to complete objective in battlegrounds. If you are playing in Warsong Gulch, you need to capture the flag. Even if no one spots you or you encounter little resistance and do capture the flag, you won't be able to take it back. As Warlocks are casters, a big floating over your head will make you an even bigger target. However, you should always assist a tank while he is getting the flag as he can take lots of damages and will attract the enemies' attention leaving you free to deal damage. You should always try and support the classes there are more suited for the given objective than you as a Warlock.
   Being such a guide, it will give you important information on how to best train your talents for arena PVP and what gear you should have. Nowadays around 800+ is the resilience you need. As a Warlock, you should not go for more as you will end up loosing a lot from your offense. As usual Warlocks are part of the so-called "Drain teams". These type of setups concentrate of draining the mana off the enemy and killing them slowly. As most WL spells are casted instantly, you should always try and stay out of sight of enemy casters. If you get drained before you get to drain your targets you loose. If a melee class comes to kill you, get him out of sight from his healers and do your thing. Load him up on damage and then just use your Fear spell until he dies. If he runs away then you will be free to get back to killing the enemy casters and healers and suppressing them.
   Having such a guide at hand, it enables you to fight your enemies more efficient by taking away any unknown factors. You will know what they will do against you, when they will do it and how they will do it.