The Men's Commandments (of fashion and life)

Here is the ongoing list of The Men's Commandments (of fashion and life.)  The list is in no particular order and I am open to ideas of what can be added to the list.  These Commandments are not necessarily a strict "must obey" set of rules, but definitely good tips to live by.  They are composed of traditional rules, and a few non ideas.  Some are not my original ideas and I may borrow some from others but they are universal in the sense that most Men would agree with these rules. Now to begin the Commandments.

1. Thou shall never wear sneakers or running shoes with a Suit or any dressy attire.

2. Thou shall NEVER wear socks with sandals.

3. Thou shall have a well rounded skill and knowledge of tie knots and their functions.

4. When wearing a suit (with more than one button), thou shall never button the bottom button. Ever!

5. Thou shall never wear skinny jeans, unless you are legitimately skinny.

6. When buying a suit for the first time, thou shall be properly measured by a trained salesmen to ensure the right fit and size of the suit.

7. Thou shall have his own sense of style, but always open to new ideas of fashion.

8. Thou shall never underestimate the power and effect of a well tailored suit.

9. Thou shall NEVER pop ones collar.

10. Thou shall never wear more than 1 polo at a time.

11. Thou shall take a suit salesmen's advice with a grain of salt. For they do not always know what they are talking about.  Slim fit suits may be in style, but not for a heavier set man.

12. Thou shall never wear a backpack with a suit, blazer, or sport coat of any kind.