No plan is the best plan. It ensures you are not running like a headless chicken. You are calm, living now. You have things to look forward to. You are accepting whatever comes in the future.
I have seen people living in planning mode throughout their lives. They have always lived in the future. The castle we make out of our thoughts adds pressure on us. It makes us miserable.
Many successful people I have known had the willingness to put all their hard work into the present and leave the rest. They put their best foot forward. They had no time to make a plan.