If your relationship has gone sour and things aren’t what they used to be, don’t waste your time and hope that everything will go back to the way it was before. Bail out and save your sanity before it gets any worse.
If it sounds too good to be true, then chances are very likely it’s a scam.
There’s never a good time to deliver bad news, so don’t wait for that time. Whether delivering bad news will ruin a person’s good mood, or worsen a bad mood, just tell the person and get it over with.
Kids are really freakin’ expensive. Doesn’t mean you shouldn’t have them, but you should budget for it.
If you ask around, most people will tell you they’re better than average drivers. Most will tell you that they are great drivers. They can’t all be right!
Everybody has their own private Mount Everest they were put on this earth to climb. You may never reach the summit; for that you will be forgiven. But if you don’t make at least one serious attempt to get above the snow-line, years later you will find yourself lying on your deathbed, and all you will feel is emptiness.
- Hugh MacLeod, partial quote from his site
Never, ever tell another person (opposite sex especially) how you really feel about them.
Turn off your TV.
Visit a library regularly.
Understand that people in all walks of life tell lies. 
Smile! It is so simple and does wonders for your life. People are friendlier and remember you better. Women find you more attractive.
Do things when the time is right for you to do them, not when someone else thinks you should. The exception to this is investing, early and often.
If you’re nearsighted, get glasses or contacts. Spending 15 years of your life half blind, just because you didn’t want to be called four eyes is stupid.
Spending the $12000 you were supposed to pay in taxes on fun, and just thinking that you’ll worry about that later is not a good idea (allthough it is fun).