I second the recommendation of the Wowhead Client. You need to set up a free account at wowhead. After uploading you can check your character at wowhead. Click on "Loremaster of Eastern Kingdoms" and you get a nice view of all zones on Eastern Kingdoms and how many quests you are missing on each zone. When I went for Loremaster I always started a gaming session to check which zones I had "neglected".
Additionally you can check pets, mounts, and check your gear for potential upgrades.
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