We use Red Sweater’s FastScripts here in the lab and love it.

One of my favorite uses is as email-filer. For each of my two main accounts I have a saved mailbox. When I want to put something in the mailbox, I just hit a keyboard shortcut.

I also have a script and keyboard shortcut to get a link to the selected Mail message: I then paste the link into Things or VoodooPad so I can open up the message later.