The biggest liar you'll ever have to deal with probably watches you shave his face in the mirror every morning. Never ask a barber if he thinks you need a haircut. Always drink upstream from the herd. Never kick a fresh turd on a hot day. Never follow good whiskey with water, unless you're out of good whiskey.
Good judgment comes from experience, and a lot of that comes from bad judgment.
There's two theories to arguin' with a woman. Neither one works. Always take a good look at what you're about to eat. It's not so important to know what it is, but it's critical to know what it was. The quickest way to double your money is to fold it over and put it back in your pocket.