Change the behaviour

This is the logic the habit rests on. It is short, and it is worth reading twice.

Never fully satisfied

Always be looking for the next improvement. There is no point at which you are finished and can stop.

That is not the same as never being pleased with yourself. There are moments to be proud of what you did. There is no moment to be satisfied that the work is over.

Proud of a day, yes. Satisfied for good, no.

Your day is producing your results

Where you are right now is the output of what you do daily.