/afk Making tea
/dnd
/onlineSets your status so guildmates see why you are not answering. /afk takes an optional message, /dnd suppresses incoming whispers entirely, and /online clears both.
A one-line Lua script that prints used and total backpack slots to chat. Handy while farming, where opening the inventory panel costs you a global cooldown you would rather spend on a skill.
/script d(GetNumBagUsedSlots(BAG_BACKPACK) .. "/" .. GetBagSize(BAG_BACKPACK))