This is seriously an issue for me too! I tried experimenting with my routine. And I am not able to sleep for the last 3 nights! Over the last 5 years, the only regular thing I do is this: Creating a routine every Sunday, and trying hard, even praying, to start following it from Monday.
Yes, I did try from Saturday too. That’s also not working. Then I thought of a different perspective. Completely excluding those who have routine, I am asking those who are like me, having no order in life, isn’t this our personal quality?