Your worst day is NOT that bad. Keep that in mind whenever you feel down.
Tomorrow is a new day, a new beginning. It’s a new opportunity to do what you were supposed to do, to act how you want to act, to say what you need to say.
You have been blessed with so much in this life. Do not take it for granted. After you take a few deep breaths, reflect on what you are grateful for. Pray, if that’s what you’re into. Or meditate if you prefer. Regardless, the better you are able to frame your life/keep things in the proper perspective, the happier you’ll be.