Requirements: A quest that requires you to pick up something that doesn't bring up a loot window/dialogue box.
Also works for some other quests that require you to put down items.
Item you're picking up must be an instant cast.
We've been there when we find quests and we can't find the last item we need.
When you come across one of these quests where you need to fetch someone something, say, pick up 6 Randomherbs. If you spam click the randomherb node, you have a chance for the system to give you two of the item from only one node.
I will come back an edit this post when I can get the correct name of such a quest. But until then, enjoy the somewhat easier questing!