Useful chat stuff!
Have you ever been spammed? Have you ever been annoyed by your own loot message? Did you know that there is a hotkey to clean them up?
Try editing your hotkeys putting a "#s " before the spells. Then even when you're in a private chat with a buddy, all your spells will be shown only at Local Channel. If a loot information is less important than your character's hp, try Ctrl+W to remove the messages on the screen. Send a single message to a buddy without opening a private chat with "@<nameofthebuddy>@ <message>".
These things and more you can check at Chat Commands page.
Have them all memorized!