My brother always said never to volunteer for charity work - spend your time racking up money and donate. Not particularly useful, I guess, and I don’t see myself doing either, but hey!
Never open your mouth unless you’re absolutely sure you know what you’re talking about. Never pretend you know what you’re talking about when you don’t. This isn’t just an honesty thing - you’ll get burned, I promise you.
Oh, yeah. Fools rush in where wise men never go. Use this to justify cowardice whenever possible.