Is it better to write a to do list each morning, or less often? Like three times a week?

I write a to do everyday. Even if it's to say "Nothing to do today!" or just a single yhing you want to get done.
It helps me start the day accordingly and if I need to give more energy to the day or less.

I usually write my to-do list the night before. That way you won't spend precious time in the morning writing this list down. Also, I follow this habit of writing down only 6 main Todo items and prioritizing them. I make sure I complete task 1 (highest priority) before moving on to task 2. If any of the tasks are not completed, say task 5 and 6, then they become task 1 and 2 for the next day. I have been following this religiously for a month now, and my productivity has tripled.