Make peace with your past so it won't spoil the present.
Don't compare your life to others. You have no idea what their journey is all about.
No one is in charge of your happiness except you.
Frame every so-called disaster with these words: 'In five years, will this matter?'
However good or bad a situation is, it will change.
Your job won't take care of you when you are sick. Your friends will. Stay in touch.