Advice For The Lovelorn

OK, so I lied. But the title go you to read didn't it. It's that time of the week - time for Mama Kat's Writer's Challenge. This week featured a number of prompts that didn't enthuse me to the point of taking quill in hand (or finger to keyboard as the case may be). But at least number one came through and spoke to me:

1.) Share one piece of great advice you’ve received from someone who knows stuff…

Rather than one piece of advice, I thought I'd share several.

• Water flows toward money. (From my grandfather, in reference to the fact that money can abrogate water rights quicker than a lightning flash.)
  

• If a simple physical model can't explain it, you have the wrong idea. (Richard P. Feynman on why complex mathematical models of reality are often wrong.)
  

• There will be many people you can love and who can love you in your life. The one you marry will be the one you are in love with at the same time you both want to get married. (A paraphrase of a discussion with my mother.)
  

• Don't tease the sow. (My uncle, warning us to stay away from the vicious man-eater that was the old breding pig.)

So what is your good advice?

BTW, here are some tidbits of advice I found floating around Google:

Which one do you think is better?