Learn from mistakes but don't dwell on the past. Plan for the future but be flexible with change. Improve yourself but don't lose yourself.
I'm stronger because I had to be, smarter because of my mistakes, happier because of the sadness I've known, and wiser because I've learned.
It doesn't matter what they say, because only you know what makes you happy.
The ultimate secret to happiness is to wake up every morning telling yourself that you are in a good mood.