Hint/Tip/Fact Compilation

[mefdinkins]

What's a hint/tip/fact you wish you knew day 1 of starting P1999, or a random tip that you wish to share with everyone else.

Example: My buddy didn't know you could re-arrange your spell book by right clicking a spell and then again right clicking where you want it to be.

Example2: I forgot that you could Alt+Click a stack of 20 items to automatically pick up 1 item from that stack.

After realizing both of these facts we were kicking ourselves for forgetting. I know there's a lot of great information on the forums and P1999 wiki but what are some 'common sense' or 'basic' things that not everyone knows? If this thread gets going I can try to compile these pro tips into another guide for the wiki.

So what else are some pro EQ tips?!?