The darker months change more than the clock. For some of us, concentration is the first thing they take.
That does not make an old to-do list a moral test. A list that expects you to finish things in order only works when a reliable stretch of focus is available. When it is not, the same list becomes a daily record of what you did not do.
I plan differently from the autumn equinox. Instead of treating every item as a task to finish, I keep a few projects open at the edges. Each one can take ten minutes or forty, depending on whether deep, steady or low energy has turned up. A project left open is not evidence that I failed. It is somewhere to return to when the focus comes back.
Seasonal planning is not about pretending the darker months are easy. It is about making your system less likely to punish you for being a person who lives through them.
What part of your work changes first when the light goes?