Creating a routine when no two days are alike

In Monday’s newsletter, I offered advice to a writer and multiple sclerosis patient who craves routine but whose days are unpredictable. In my answer, I suggest that it’s OK not to have a routine—and I also give the example of Charles Darwin, who used a gentle routine as a bulwark against his own chronic illness. But I’d love to hear from readers who have additional ideas and suggestions. How do you craft an effective routine when no two days are alike? Please add your thoughts and I’ll be reading and replying.