Byron Katie wrote a book called Loving What Is.
In it, she describes that we actually only have our current reality to work with. In any moment, we can choose to accept it or resist it.
We often have thoughts that things should be different than they are. When we believe these thoughts, that thing should be different than they are, we are arguing with reality; we end up suffering. When we don't believe the thoughts, we can observe them from a distance and possibly enjoy them as when we watch clouds float overhead and find them to be curious and interesting.
An oft-quoted line from the book is: When you argue with reality you will lose, but only every time.
A single thought, or a question I'll ask myself in order to make myself more resilient is simply this: How can I work with what is actually available to me in terms of time, resources, energy and motivation?
With this approach, I'll be humble about what I promise. I'll be willing to take the small actions that eventually lead to results. I'll check in with my reality compass daily. Ultimately, if I approach each day with reality on my side and a willingness to show up and do work, how can I not improve over time?