…is how well you manage your time.
To never waste your time, schedule your days. Including the fun times.
Otherwise there are so many distractions that one day you will end up wasting not your time, rather your life.
What do you do when you are bored?
That is what will determine what you will do when you have all the time in the world.
Distracted can’t be obsessed. Obsessed can’t be distracted.