Does it have to be one or the other?
There will be patches when "one day at a time" is the best strategy (substitute "hour" and "minute" for "day" as needed).
There will also be times when "never" is the best strategy.
I'm only on Day 4 ... but I did quit for 5+ months earlier this year. At that time, the one day at a time strategy worked best early on. Now, I can see the value in "never".
I would suggest having a tool box full of strategies and use what is most appropriate at any given time.