My dad left this little bit of advice for me when I was a teenager. I have tried to remember it and live by it. I trust that you can relate:
If you, your lips would save from slips, these things observe with care
Of whom you speak, to whom you speak, or how or when or where
If you, your ears would save from jeers, these things keep mildly hid
Myself and I, or me and my, or how I do or did more...