When reading this post on habits of über-productive people, the following point jumped out at me:
They can still do their best on their worst day.
I resist labeling anything as a “bad” day.
Everybody has their “stuff” in life. Everyone has their challenges. I don’t care the level of money that you are earning or the stage in your career, it should not be easy. If your day is not filled with resistance and challenge, you’re probably not doing it right. This comes with the territory of creating something remarkable.
The key is what you take away from that “stuff” and then build and improve upon it. Looking past those challenges, opportunity is likely sitting there as well. Capitalize upon that.