I'd imagine this is very individual and depends on your life in total. How much are you sleeping each night? How well are you eating? How clear are your goals

I'd imagine this is very individual and depends on your life in total. How much are you sleeping each night? How well are you eating? How clear are your goals at work and how much do you able to progress along them? How much time are you spending with people who care about you and rejuvenate you?