Well before the newest patch, Loremaster was a pain to complete due to not knowing which quests you've already done. But with 3.3, Blizzard now allows addons read what quests you've already completed. This makes completing the achievement A LOT easier.
1). Download the addon EveryQuest:
EveryQuest - Addons - Curse
I also recommend getting Tomtom/Lightheaded to make it easier to find where the questgivers are for the quests you haven't completed.
Tomtom:
TomTom : WoWInterface Downloads : Map Mods, coords/compasses
Lightheaded:
LightHeaded : WoWInterface Downloads : Quest/Leveling/Reputation Mods
2) Once EveryQuest is installed, start WoW and type /everyquest to bring up the configuration.
3) Click "Options" and go to Server Query. Click Query Server and the addon will get your completed quest history.
Now you can easily go from zone to zone checking which quests you've yet to complete. The one's you've already done will be in green.
This is where Lightheaded/Tomtom come in handy. Just go through all the white quests in the Everyquest menu and click the ones you haven't done (colored in white). I recommend starting from the bottom as most of the quests in the top of the menu are part of chains.
When you click the quest, the Lightheaded menu along with your quest log will pop up. Just click the blue text where it says "Starts" and Tomtom will lead you to the questgiver. From here on you can use the blizzard quest helper to find where to do them, and you can read wowhead comments with Lightheaded.
And that's all you need to do. Now you just need to complete all the quests for the achievement.![]()