Just b'cuz one thing doesn't go right doesn't mean your life is ruined. Stay positive.
Everything in life is temporary. Every time it rains, it stops raining. Every time you get hurt, you heal. After darkness there is always light – you are reminded of this every morning, but still you often forget, and instead choose to believe that the night will last forever. It won’t. Nothing lasts forever.
So if things are good right now, enjoy it. It won’t last forever. If things are bad, don’t worry because it won’t last forever either. Just because life isn’t easy at the moment, doesn’t mean you can’t laugh. Just because something is bothering you, doesn’t mean you can’t smile. Every moment gives you a new beginning and a new ending. You get a second chance, every second. You just have to take it and make the best of it.