This is my post for day 5 of Spellbound's Blogging Challenge - My Favorite in game Item.
Besides gold? Probably Noggenfogger Elixir. It isn’t really used to much now (that I know of) and seems to be a bit of a forgotten item now that you can fly in Azeroth. Before the cataclysm though Nogenfogger was probably the number one tool of people who liked exploring. The slow fall would allow you to get to places you couldn't otherwise get to and so I always kept some on my toons. Even though it’s time as passed I still have a real soft spot in my heart for this stuff.