Best Advice You've Ever Received

Was reading this helpful article from Fortune highlighting 22 leaders and them talking about the Best Advice They've Ever Received. Also a great article from Bill Gates on advice he's received. In thinking about the best personal advice I've ever received, here are a few that stand out:

My dad's advice- "Never let someone out work you."

My mom- "present yourself with excellence, including your appearance and your words."

And St. Francis- "Preach the Gospel at all times, and if necessary, use words." He actually didn't tell me this one in person, and could be used by many others.... But it is such a good statement I had to include it.

Another one for me is "Listen way more than you talk. Be the best question asker in the world." And "Do what you love" and "Keep it simple." 

How about you? What's the best advice you've ever received?