After reading through the forums at paizo.com you’ll reach a point when you’ll really want to know what all those builds are that they are talking about. Luckily someone asked just this question and created a thread of all the articles out there on building the best Pathfinder characters. I am reposting the list here so that should the thread disappear we’ll still have the list to reference.
Guides in Alphabetical Order by Class Name
Alchemist
Antipaladin
Barbarian
Bard
Cavalier
Cleric
Druid
Fighter
Gunslinger
Inquisitor
Magus
Monk
Ninja
Oracle
Paladin
Ranger
Rogue
Samurai
Sorcerer
Summoner
Witch
Wizard
Guides in Alphabetical Order by Core Prestige Class Name
Arcane Archer
Arcane Trickster
Assassin
Battle Herald
Champion of Irori
Dragon Disciple
Duelist
Eldritch Knight
Loremaster
Mystic Theurge
Pathfinder Chronicler
Psychic Warrior
Shadowdancer
Soulknife
Stalwart Defender
Tactician
Vitalist
Other Useful Guides for Spell casters
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Other Useful Guides in Alphabetical Order
3rd Party
This guide is also mirrored at:
Many of the guides above and more:
Tips & Tricks
Action Economy: Time Savers (Blog)
Ashiel’s Guide to Adventure: Preparation, Tricks, and Strategies (Core, APG, UM, UC) [Discussion]
The Forge of Combat: Thoughts on Victory and How the Group Achieves it [Discussion]
Equipment
Good And Cheap Equipment Part 1 and Part 2 and Cheap Ioun Stones and Cheap Wands (Blog)
Improving Your Class with Items [Discussion]
The Handy Haversack Pack (3185 Gold and 5 pounds, this sack has everything the adventurer might need)
The Viking Irishman’s Guide to Weaponry (Core, APG, UC) [Discussion]
Summoned Monsters and Animal Companions
Animal Companion Comparison (Blog)
Spells Your Summoned Monsters Can Cast (Short)
Summon Good Monster: A Closer Look (Thread)
Why Work When Others Can do it For You (Monster Summoning)
General Character Building
Dipping for Fun and Profit (Thread)
Getting X to Y: How to make a Attribute do other things (Core, APG, ARG, UC, UM) [Discussion]
Possible Archetype Combos
Tips and Traits: A guide to Pathfinder Traits (Core, APG, UM, UC) [Discussion]
Specific Class Abilities
Abraham Spalding’s Guide to the Holy Vindicator (or more specifically channeling) (Core, APG, UM, UC) [Discussion]
Being a Most Concise and Helpful Guide to the Noble Arts of Wild Shaping and Polymorphing (Core) [Discussion]
Guide To Spells (Core, APG, UM, UC) [Discussion]
Polymorphamory – The Love of Changing Form: A Guide to Shapeshifting [Discussion]
Shadow Conjuration Handbook (Discussion)
Abusing Animals: A Guide to Sharing Spells with Animal Companions for Non-Druids [Discussion]
Word of Power Handbook (Thread)
GM Guides
Brewer’s GM Guide to Campaign Design [Discussion]
GM’s Guide to Creating Challenging Encounters [Discussion]
Other
 A Guide to Trip Builds in Pathfinder
So you want to play Pathfinder RPG: A Comprehensive Guide for Dungeon Masters and Players [Discussion]
Brewer’s Guide to Undeath (Building an Undead Army) [Discussion]
How to Use Leadership [Discussion]
Raving Dork’s Crazy Character Emporium (An Amazing List of Creative and Interesting Builds)
Casting Spells from other Lists (Thread) [Discussion]
Guide to the Builds (Discussion)
Great thanks to Harmon’s Guide to the Class Guides on the Paizo messageboards, Hallack’s Pathfinder Handbook and Handy Links Index on Minmax Boards, Novawurmson’s Optimization Guides Compendium on Giant in the Playground, and all the rest.