Randy Pausch quotes
No matter how bad things are, you can always make things worse. 
We cannot change the cards we are dealt, just how we play the hand. 
Experience is what you get when you didn't get what you wanted. And experience is often the most valuable thing you have to offer. 
Complaining does not work as a strategy. We all have finite time and energy. Any time we spend whining is unlikely to help us achieve our goals. And it won't make us happier. 
If I only had three words of advice, they would be, Tell the Truth. If got three more words, I'd add, all the time. 