I found this information on www.wowwiki.com.  Some very useful priest macros.

I try to pvp but often times fine myself searching for something.  These macros seem like they will help me a lot.

Not wasting time target switching, having to click on a spell that is not with in my left hands homerow reach.

So I should be able to have a little more time to see what is going on in the PVP environments.

Pain Suppression

casts pain suppression on your mouseover and alerts raid with a link and the length of effect

/script local u,ps,c="mouseover","Pain Suppression",GetNumRaidMembers()>0 and "Raid";if IsSpellInRange(ps,u)==1 and GetSpellCooldown(ps)==0 then SendChatMessage(GetSpellLink(ps).." for 8 seconds on "..UnitName(u),c) end
/cast [@mouseover] Pain Suppression

Pain Suppression

Casts Pain Suppression with the following parameters:

http://images1.wikia.nocookie.net/__cb20014/common/skins/monobook/bullet...); padding: 0px;">
• No focus, no target – Pain Suppression on the player
• No focus, a friendly target – Pain Suppression on the target
• Friendly focus that is not dead – Pain Suppression on the focus
• ALT modifier – Pain Suppression on the player
• CTRL modifier – Pain Suppression on the target
• All other situations will result in Pain Suppression being cast on the player (aggro target, aggro or dead focus, no target, etc.)

#showtooltip
/cast [mod:alt, target=player][mod:ctrl, target=target][target=focus, exists, nodead, noharm][target=target] Pain Suppression

http://images1.wikia.nocookie.net/__cb20014/common/skins/monobook/bullet...); padding: 0px;">
• Credit: Xaeros of Shadowmoon
• Works in 3.1.3

Pain Suppression

This is another macro like the last that is more for PVE healing because it only casts the spell on the focus target, but it also checks whether you're in a raid or party, then announces it accordingly. you can also always replace the two words "focus" with "mouseover" in order to have it cast on your mouseover. when changing it to a mouseover macro you also need to remove the first showtooltip line, in order for it to fit into 255 characters

#showtooltip
/script local u,ps,c="Focus","Pain Suppression",GetNumRaidMembers()>0 and "RAID" or "PARTY";if IsSpellInRange(ps,u)==1 and GetSpellCooldown(ps)==0 then SendChatMessage(ps.." on "..UnitName(u),c) end
/cast [target=Focus] Pain Suppression

Power Infusion

This power infusion macro does an error check in order to see if you can cast power infusion or not. this keeps you from sending erronious power infusion messages. As with before you can cast this as a mouseover script and replace "YOURCASTERNAMEHERE" with "Mouseover"

#showtooltip
/script local u,pi="YOURCASTERNAMEHERE","Power Infusion";if IsSpellInRange(pi,u)==1 and GetSpellCooldown(pi)==0 then SendChatMessage("You just got "..GetSpellLink(pi).."!","WHISPER",nil,UnitName(u)) end
/cast [target=YOURCASTERNAMEHERE] Power Infusion


Disc priest main heal

Casts Penance, or Flash Heal or Smite based on what is available and what you are targeting:

#showtooltip Penance
/stopmacro [channeling]
/console Sound_EnableSFX 0
/use 13
/use 14
/castsequence [harm] , Smite; , Flash Heal
/cast Penance
/console Sound_EnableSFX 1
/script UIErrorsFrame:Clear()

http://images1.wikia.nocookie.net/__cb20014/common/skins/monobook/bullet...); padding: 0px;">
• Focus: Universal
• Suggested key bind: Mouse Up
• Validated: 3.1

Disc priest main prevention

Places a shield on friendly targets, DoTs on enemies to lead off combat. When you are in a group, it wands.

#showtooltip
/dismount [mounted]
/castsequence [group, harm] !Shoot; [harm] reset=5/target Shadow Word: Pain, Devouring Plague, Power Word: Shield; reset=target/2 Power Word: Shield, Renew

http://images1.wikia.nocookie.net/__cb20014/common/skins/monobook/bullet...); padding: 0px;">
• Focus: Universal
• Suggested key bind: Mouse Down
• Validated: 3.1

Disc priest PvP healing

Heals the target of your target (that is, clicking an enemy will heal the enemy's target) using Penance, followed by Power Word: Shield, and Flash Heal. If you have 4/5 of the healing Gladiator set, change the reset to 13 (seconds). This macro resets itself just before your Power Word: Shield comes off cooldown.

#Show Penance
/castsequence [target=targettarget] reset=15 Penance, Power Word: Shield, Flash Heal, Flash Heal, Flash Heal, Flash Heal, Flash Heal, Flash Heal

http://images1.wikia.nocookie.net/__cb20014/common/skins/monobook/bullet...); padding: 0px;">
• Focus : PvP or PvE healing
• Validated 3.1
• Credit: Lyrà of Frostmane (US) (contact directly for any ideas for macros or macro requests, to WoWLyra@gmail.com).

editCredit wowwiki.com