Write the thoughts down; it clarifies the situation for you and off-loads your mind.
Too much thought is the equivalent of worry and it creates stress in your life. Writing is the vent that relieves this stress.
You live today, focus on the today. The tomorrow will depend on well you do today. Inane worry does not do anything for you.
These aren't short lists of rules, these are tools to thrive in this world.
Thrive don't just survive!