Stay together - BGs are massed PVP. If you get caught out solo you are most likely going to die. Exception: Sacrificing your body to stall an enemy push.
Heals win BGs - Kill enemy heals, keep yours alive and you win. Use your CC to control enemy healers or to peel enemy dps off of your healers. There are no exceptions to this one.
Always top off your health and mana immediately after a fight. You never know when the next fight is coming. Bandages, food, and drink are cheap. Use them.
Fight at the nodes - HKs do not win BGs on their own. Work the objectives. Exception: any time you individually hold up more than two enemy players from fighting on a node can be a plus for your team.
Stop flag caps - stopping a cap means any allies you have lost defending the node are going to be back at full hp is no more than 30 seconds. This is way more valuable than another HK.
Attack GY spawns - when it is possible - this chokes a response to an attack on a node.
In Rated BGs - Follow your team leader's orders or you won't be invited back. If you want to argue strategy do it after the battle in private chat. Check your ego at start point. Remember that you gotta be someone people want to play with, and NO ONE is In dispensable.
Mind your cooldowns - this isn't arena - that guy you just blew everything on is coming back shortly and he may bring friends. Use your cooldowns appropriately.
Buff at the start - be aware of what buffs stack and which buffs overwrite each other. Summon tables and healthstones. Drop feasts. Also buff every time you rez.
Hide as often as possible - if you aren't actively fighting on a flag and are not a stealth class go hide somewhere you can see the flag and get to it in time to prevent a cap. Casters should always hide where they can still cast freely without LoS issues. It is more difficult to target a caster or ranged who is hiding in a bush than one out in the open especially if you are only casting spells that do not travel.
Understand the terrain - Choke point control wins BGs. Breaking LoS can win or lose you BGs.
Don't be afraid to die - this is not arena - running away is generally not going to benefit your team as much as holding your ground will. Obvious exception is WSG. Another exception is trying to bait enemy defenders off a node.
Sometimes it is okay to die - rezzing at full strength can be better than barely surviving.
Don't always wait for the spirit rez - if you haven't died recently, you have a long rez timer and your flag is under heavy attack, run to your body. Those extra few seconds may buy time for reinforcements to arrive.
Healer priorities - healers should focus on themselves, then other healers, then dps. Option: A strong strat is to have one healer raid healing and another healing them if they need it. This drives undisciplined teams nuts.
Choose your battles - recognize when an objective is a lost cause, and instead of rushing into a fruitless battle move on to another objective. Can vary by BG.
Be unpredictable - Surprise works wonders, any experienced BG player knows what the typical allie/horde strats are. Break up those typical strats and some teams will wilt.
Donât give up â Sure there will be times when your team is getting roflstomped. But there are also times where you can hang on, catch a break and turn the tide. Often times in the bigger BGs you can at least go make your own fun. In rated BGs no one is going to want to que up with a quitter.