I wrote QuestClicks to create temporary buttons for them to make this easier. Having to dig through bags to find these items and add them to a bar, only to have to get rid of them after the quest was completed, was a pain. Throw parachutes to troops, thaw people out with a flamethrower, planting acorns in dead dragons, and the like. Originally, this add-on was created in response to the large number of usable quest items introduced in WoLK – the kind where the quest giver would hand you an item and tell you to go somewhere and use it.
QuestClicks generates a dynamic bar of up to 12 buttons to make your life easier.