Some days all you have left is enough energy to pack it in, and call it a day. Not a good day, maybe not a bad day, maybe just another day. The secret is to leave just enough in the tank that you can come back in and fight tomorrow.
The Ups and Downs of life can be consistent for most of us. The longer you give it all you can on a consistent basis eth easier it gets. Tomorrow is another day, in a sense a brand new opportunity to achieve a moment of joy.
Only thing you have to do is get up and get back at it. Just don’t quit, never, ever quit. More people count on you than you may ever know.