ASPIRATIONAL anagrams to PLAN IS A RATIO.
It’s a simple ratio: the more aspirational your goal is, the more significant you need to plan.
If your goal is routine, you probably don’t need to plan all that much. If your goal is novel, or extreme, or very challenging, you almost definitely haven’t spent enough time planning.
It’s almost impossible to plan too much when your goals are aspirational.
Knowing how aspirational your goals are, and how much you therefore need to plan, is an important part of becoming better at consistently executing your goals.