Doing a quick scan of the notes for Patch 3.3.3 I came upon this little gem:
Quest items in a player's inventory which begin quests now each have an exclamation point overlaid on their icons to make them more easily identifiable.
This is a welcome change for me! I can't tell you how many times I have overlooked quest drops in my inventory only to stumble across them very much after the fact and backtrack to turn the quest in.
While trudging through the Loremaster achievement it was quest drops that gave me the most trouble. I'm sure that I just abandoned some enroute because I was tired of the zone and/or I didn't want to have to go back to X location because of Y mobs.
Looking back I'm not even sure how I made it out of Mulgore I was terrified so often.