I read this on Kim's blog today and felt it needed to be shared here too.
In which we learn how to conduct our conversation.
If you your lips would keep from slips,
Five things observe with care;
Of whom you speak, to whom you speak,
And how and when and where.
If you your ears would save from jeers,
These things keep meekly hid:
Myself and I, mine and my,
And how I do and did.
from the Book of Virtues