Friendship is the hardest thing in the world to explain. It's not something you learn in school. But if you haven't learned the meaning of friendship, you really haven't learned anything. - Muhammad Ali
When you can't control what's happening around you, challenge yourself to control your response to it.
Happiness comes easier when you stop complaining about your problems and start being grateful for all the problems you don't have.
If you have a hard time believing in yourself, remember who you were before the world taught you to doubt yourself. Don't see yourself through the eyes of those who didn't see value in you. Know your worth even...
Surround yourself with people who talk about visions and ideas, not other people.