Here are a few from 50 things I've learned in 50 years, a partial list in no particular order, by Eric Zorn:

• It’s better to sing off key than not to sing at all.
• Promptness shows respect.
• You can’t avoid offending people from time to time. When you don’t mean it, apologize. When you do mean it, accept the consequences.
• The first person to use the expression “Get a life!” in any dispute is the loser.
• The most valuable thing to have is a good reputation, and it’s neither hard nor expensive to acquire one:
  • Be fair.
  • Be honest.
  • Be trustworthy.
  • Be generous.
  • Respect others.
• It’s not “political correctness” that dictates that we try not to insult others’ beliefs and identities. It’s common decency.
• It may not feel like it, but it’s good luck when you have people at home and at work who aren’t afraid to tell you when you’re wrong.
• Don’t waste your breath proclaiming what’s really important to you. How you spend your time says it all.
• It’s never a shame when you admit you don’t know something, and often a shame when you assume that you do.
• Fear of failure is a ticket to mediocrity. If you’re not failing from time to time, you’re not pushing yourself. And if you’re not pushing yourself, you’re coasting.
• Anyone who judges you by the kind of car you drive or shoes you wear isn’t someone worth impressing.
• Grudges are poison. The only antidote is to let them go.
• In everyday life, most "talent" is simply hard work in disguise.
• Two cheap, easy self-improvement projects:
  • Develop a strong handshake
  • and start smiling when you answer the phone.
• Physical attraction is nice, but shared values and a shared sense of humor are the real keys to lasting love.
• To keep dental visits regular, schedule your next appointment on your way out from your last appointment.
• The 10-minute jump start is the best way to get going on a big task you’ve been avoiding. Set a timer and begin, promising yourself that you’ll quit after 10 minutes and do something else. The momentum will carry you forward.
• Goals that you keep to yourself are just castles on the beach. If you’re determined to achieve something, tell people about it and ask them to help you stick with it.
• Mental illness is as real as diabetes, arthritis or any other disease, and no more disgraceful. It’s the stigma that’s disgraceful.
• All the stuff you have lying around that you’ll never want, need, wear or look at again? It just makes it harder to find what you do want, need or intend to wear. File it, donate it or throw it out.
• When you mess up, ’fess up. It’s the fastest way, if there is one, to forgiveness.
• When you’re not the worst-dressed person at a social event, you have nothing to worry about.
• Be truthful or be quiet. Lies are hard to keep track of.
• Whatever your passion, pursue it as though your days were numbered. Because they are.

- Positive Thoughts, by riyuu.org

- Billy Mack (Love Actually):

• Hiya, kids. Here's an important message from your Uncle Bill: don't by drugs. ... Become a popstar and they give you them for free!

- Cool Runnings/RastaRocket:

• Sanka, you dead?