What are some examples of societal rules?

Question

What are some examples of societal rules?

Answer 1

Speaking in a "normal" tone and volume while in public.

Wave when seeing a friends.  (it's rude otherwise)

It's proper for men to open a door for a lady.

Spoon and knife get put on the same side of the plate.

Answer 2

wearing of clothing, not using the bathroom in public, shaking hands, introducing yourself or others, etc.

Answer 3

Try the ten comandments.