I was talking to a guildie earlier and he mentioned that he sort of expected all raiders to be able to read, and more specifically read up on their own class.
Then just 5 minutes ago I came across a blogpost in my reader titled "10 things every manager should know."
The list below is not in order of importance, they're all important. Also, there are probably a lot more than 10, if you wish to put more on this list feel free to leave it in the comments :)