Hey guys. This is a very BASIC outline of each faction, and what you can do to obtain the reputation you wish. This is not meant to contain any detailed information, but just a brief overview of how you can achieve a good reputation with your desired faction.
Aldor
Neutral - Honored: Marks of Kil'Jaeden
Honored - Exalted: Marks of Sargeras, Fel Armaments, Quests
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Ashtongue Deathsworn
Neutral - Exalted: Black Temple, quests
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Cenarion Expedition
Neutral - Honored: Unidentified Plant Parts, Slave Pens, Underbog
Honored - Exalted: Steamvault, Quests, Coilfang Armaments
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Consortium
Neutral - Friendly: Mana Tombs, Crystal Fragments, Heads Full of Ivory
Friendly - Honored: Mana Tombs
Honored - Exalted: Quests, Heap of Ethereals, Obsidian Warbeads, Ethereum Prisoner Keys
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Honor Hold
Neutral - Honored: Ramparts, Blood Furnace
Honored - Exalted: Quests, Shattered Halls
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Keepers of Time
Neutral - Exalted: Quests, Old Hillsbrad, Black Morass
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Kurenai
Neutral - Exalted: Quests, Obsidian Warbeads, Grinding Mobs
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Lower City
Neutral - Honored: Auchenai Crypts, Sethekk Halls, Feathers
Honored - Exalted: Quests, Shadow Labyrinth
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Mag'har
Neutral - Exalted: Grinding Mobs, Quests, Obsidian Warbeads
Note: Consortium also takes Warbeads, I advice finishing all quests and grinding the mobs for the rep, while turning the Warheads in for Consortium.
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Netherwing (require 300 Riding Skill To achieve Exalted)
Friendly - Exalted: Daily Quests + Egg Hunt
List of Quests: Egg Hunt, A Slow Death, Netherdust Pollen, Netherwing Crystal, Not So Friendly Skies, Great Netherwing, A Cure for the Common Worthless Peon, Picking up the Pieces, Dragons Are the Least of Our Problems, Disrupting the Twilight Portal, The Greatest Trap Ever Laid
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Ogri'la
XXX - Neutral: Quest chain "Speak with the Ogre"
Neutral - Honored: The Relic's Emanation (Daily), Wrangle Some Aether Rays, Bombing Run
Honored - Exalted: All 3 above, plus Banish the Demons
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Scale of the Sands
Neutral - Exalted: CoT: Battle of Mount Hyjal, The Vials of Eternity
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Scryers
Neutral - Honored: Firewing Signets
Honored - Exalted: Arcane tomes, Sunfury Signets, Quests
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Sha'tar
Neutral - Honored: Aldor/Scryers turnins
Honored - Exalted: Quests, Tempest Keep
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Sha'tari Skyguard
Neutral - Exalted: World of Shadows, Fires Over Skettis, Escape from Skettis, Wrangle Some Aether Rays!, Bombing Run
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Shattered Sun Offensive
Neutral - Exalted: Daily Quests, Magister's Terrace
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Sporeggar
Neutral - Friendly: The Sporelings Plight, Bog Lord Tendrils
Honored - Revered: Bog Lords
Revered - Exalted: Quests, More Bog Lords
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The Violet Eye
Neutral - Exalted: Karazhan, Quests
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Thrallmar
Neutral - Honored: Ramparts, Blood Furnace
Honored - Exalted: Quests, Shattered Halls
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I hope you guys enjoyed this guide. If you have any questions or comments, feel free to leave them below or send me a PM!