Possible Duplicate:
Label outgoing emails in Gmail when composing the mail
I use GMail's labels extensively, and would often like to specify labels on email I'm sending - specifically I have a waiting label for stuff I need to follow up with if I don't get a reply. But there are plenty of other labels I'd like to attach to outgoing email sometimes.
Is there a way to do this without having to go to the Sent Mail folder after I've sent the email?