My farewell speeches are never eloquent. I grunt, hug, kiss and say something prosaic like, "Take care." The next time someone leaves, I'll be armed with the following quote:
Until next time, farewell. Avoid roasted cabbage, don't eat earwax, and look on the bright side of life." --Angela, Christopher Paolini's EldestFYI, Paolini published Eragon when he was 16!