I need to dig up a copy of my 'rules to live by' and update it... might have one at home some place. I have a hard copy here at work.
1322- Anything worth doing is worth doing half assed
3813- Never leave weapons lying around.
3814- Pick them up; you never know when you will need to hurt someone.
How about "always smile and be polite when you stab someone. It tends to confuse the survivors" - is that on your list?