That is a big lesson. I cannot always write late at night, so I need to start writing earlier, or just write at the moment of the day when I realize there is a lesson I learned.
I have, for the last few days, getting very tired by the end of the day to really write something that makes sense. So I decided that I will be more flexible with my writing, and it will happen at any point of the day that it needs to happen. What is the most important is that it happens every day.