Sometimes, the little things in life can be so rewarding. Like not having to toggle between applications to skip a song in my playlist. I wrote three lines of AppleScript:
tell application "iTunes" next track end tell
compiled them as an application called 'skip', and popped them in my Applications folder. After a catalog refresh, I can now invoke Quicksilver, type 'sk' (it auto-completes to 'skip'), hit enter, and move to the next song. All without having to leave the application I live most of my life in ... vi.