As you all have probably noticed from my “It Came From The Meeting Stone” screenshots, not being a tard when standing at the trainer clicking the little talent buttons is important to me. And since there seem to be some people determined to be creative, original, or just entirely avoid min/maxing for who knows WHAT reason… I’m gonna make a handy little post. And more than that, I’m going to macro it with a /t %t “Hey, it may have escaped your notice, but your spec is bad. I don’t see how you can be anything but a drain on your raid with a spec that special. Please check out the guide at {here} and thank me later.”
Okay, first of all, there are two types of priest: Holy (*buffs nails*) and Discipline (… meh). Okay, there’s the replenishment bot in the corner, but we don’t care about them. Their purpose is just to fill our neverending mana pool. But on to the basics.
First, you’ve two options for spec, with some wiggle room allowed in each.
Discipline (54/13/0 — points remaining: 4)
Holy (14/54/0 — points remaining: 3)
You do NOT have the option to try and pick a little of column one and a little of column two. Doing so does not make you a tender and unique snowflake. It makes you spend a respec fee to not do it wrong.
Breakdown:
Must haves — Both specs
Twin Disciplines : Superior choice to Unbreakable Will; more spellpower is good.
Improved Fort : Unfortunately, we need it.
Improved Inner Fire : Starting at lv 71, Inner Fire gives a spellpower boost. Improved improves it. Better choice than Silent Resolve.
Inner Focus : A free spell (with bonus improved chance to crit). Good for getting time out of the 5 second rule.
Meditation : Our primary regen talent.
Holy Specialization : Crit is very important to several of our talents. This is a free 5%.
Divine Fury : Reduced cast time to smite, holy fire, flash and greater. Superior to Spell Warding.
Inspiration : If there’s any chance you’re going to be having a heal land on a tank, you want this maxed.
Must haves — Discipline Spec
Improved PW Shield : You’ll be shielding a lot; improve it.
Mental Agility : Reduced mana cost on instants, good for all the shielding you’ll be doing.
Mental Strength : More mana, better results from Replenishment, required for Power Infusion.
Focused Power : Increases Spellpower
Enlightenment : Improved stats plus haste
Power Infusion : Not just for mages 
Renewed Hope : Improved crit meshes well with Divine Aegis
*Grace : (see Situational section below)
Rapture : Mana regen talent
Aspiration : Primarily for the reduced cooldown of Penance
Divine Aegis : Good with Renewed Hope. Again, shields are vital.
Pain Suppression : Good “oh shit” button
Borrowed Time : Haste and more shield improvement
Penance : Penance and Shield are the two main “bread and butter” spells of the discipline spec. Don’t spec Discipline without this talent.
Suggested Use of Leftover Points — Discipline Spec
Desperate Prayer, Improved Renew, Divine Spirit — Regular DS is the strongest of these, but they all work.
Situational: If you don’t run with Shammies, feel free to go IDS. If you don’t have a protadin, get *Grace.
Skip — Discipline Spec
Improved Divine Spirit : Does not stack with Flametongue Totem. If there are shammies in the raid, chances are this is a wasted point.
Reflective Shield : Only reflects damage done to you when you are shielded. Does not reflect damage when anyone else is shielded.
*Grace : Damage Reduction does not stack with Blessing of Sanctuary, though the boost to +heal does.
Must haves — Holy Spec
Improved Renew : Better option than the alternatives
Improved Healing : Reduced mana cost of heals
Holy Reach OR Desperate Prayer : Either of these is as good as the other. Holy Reach will increase the spread of CoH and Holy Nova. Desperate Prayer will heal you (personally, I think you’re better off with Binding Heal, but to each his own). They’re both primarily a means to jump down a tier.
Spirit of Redemption : 5% spirit increase, plus improved death.
Spiritual Guidance : Spellpower increased by 25% total spirit. Spirit is still mandatory for holy priests.
Surge of Light : 50% Chance on crit to get a free flash/smite. Good for downtime when no one needs a heal, good for getting time out of the 5 second rule when paired with Inner Focus.
Spiritual Healing : Improves healing spells
Holy Concentration : Clearcasting
Empowered Healing : Improves Greater, Binding and Flash heals
Serendipity : Mana regen talent
Imp Holy Concentration : You get a reduced cast time for Greater, Flash, and Binding, plus improved chance to proc Clearcasting
Circle of Healing : 6 second cooldown or not, this is still a valuable part of a holy priest’s arsenal, and a useful group heal.
Divine Providence : Improves healing done by all spells not Greater/Flash and reduces the cooldown of ProM.
Guardian Spirit : Good “oh shit!” button that also increases all healing done to the target.
Suggested Use of Leftover Points — Holy Spec
Healing Prayers, Test of Faith, Desperate Prayer/Holy Reach — all solid choices.
Skip — Holy Spec
Healing Focus : Changes to pushback mechanics make this talent somewhat lackluster compared to others, so skip it.