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If you fall behind in the battle of life, the first thing you need to do is be a little compassionate towards yourself. We all fall behind at some point in life, and that is very normal. Instead of getting discouraged during these times, give yourself some time, learn from your mistakes, and think about how to move forward again. Every failure is actually an opportunity to learn, so instead of hating failure, you need to accept it as a part of life.
Falling back does not mean the end of the battle, but rather it is a preparation to gather new strength and move forward again. You may come back with a new perspective or strategy, which will strengthen your next steps. I personally get mental strength from watching various inspirational content here, which helps me face various challenges in life. Falling back in the battle is a kind of break from which you can start anew.