Did you know that there is a secret room in Dalaran that you can access only if you complete the achievement Higher Learning? I just found out about it myself. And while this piece of information is practically useless, it made me think ... What other things don't I know about? And then I started remembering all the times when I learned something so basic about the game that I said to myself, "How could I not have known that?"
There was the time before The Burning Crusade was released when I was happily making my mooncloth every four days and traveling to Darnassus or Darkshore to do so, when a guildie informed me that there was a moonwell in Stormwind. "Doh!" Then there was the time that I was grouped with a friend, happily traipsing around Eastern Plaguelands (so yes, I was almost level 60), and I would stop running every time I had to respond to an in-game whisper. My friend asked me what I was doing, and I explained that I had to stop running to type a response. He then informed me that I could use the mouse to auto-run and keep my hands free to type. "Doh!" More recently, I was in Dalaran exchanging Emblems of Triumph for Emblems of Conquest for Emblems of Valor for Emblems of Heroism ... (big gulp of air) ... in order to purchase Reins of the Wooly Mammoth. I needed 200 Emblems of Heroism, and I was exchanging all of my emblems one at a time. My guild was waiting for me to do a raid and asked what was taking so long. So I told them. And then they told me I could simply shift-right click on an emblem and pick the amount I wanted to exchange. "Doh!"
Why didn't I know these simple things? How could I have been playing this game for five years and not know these things? I used to laugh when I saw the tips on the loading screen. The one that informs the player that she can eat and drink at the same time always elicits a mental response from me that goes something like, "Who the heck doesn't know that? What a dumb tip." But recently I have begun to realize that there are many people just like me who let the simplest nuances of the game escape them for some reason or another.
So what things are you embarrassed to admit that you didn't know until you were well entrenched in the game? Don't worry, we'll never tell (wink, wink).