I use TextExpander ALL THE TIME!
I use it to quickly respond to commonly-asked questions that have the exact same answer, it can bring up Google spreadsheets where I track my progress with each client's podcast, and I use it to enter the same text that is used every time I upload a client's episode to libsyn.
Watch this video to understand what I'm talking about. You need to see it to believe it.
Try TextExpander at *http://SteveStewart.me/TextExpander
*Part of this URL was entered in 4 keystrokes using TextExpander