A good evening routine does not need to be strict. It simply needs to signal that the day is closing and that recovery has permission to begin.
Reduce bright light, intense work, and rapid switching between tasks. The nervous system responds well when the pace slows in stages.
Reading, light stretching, quiet tea, or a warm shower can help create a bridge from doing to resting.
The best evening routine is the one that still works on ordinary weekdays, not only on ideal ones.