It is said that there are three types of money and time: consumption, waste, and investment.

"Consumption" "Waste" "Investment" of money

"consumption"
Expenditure required for living
(Food, housing, transportation, etc.)

"waste"
Expenditure that does not have to be for living
(Luxury items, gambling, etc.)

"investment"
Expenditures that will benefit you in the future
(Lessons, lectures, reading, etc.)

"Consumption" "Waste" "Investment" of time

"consumption"
Time needed to live
(Work, meals, toilet, sleep, etc.)

"waste"
Time that does not lead to happiness for yourself and others
(SNS for killing time, time spent lazily, etc.)

"investment"
Time to lead to happiness for yourself and others
(Reading, studying, hobbies, jogging, etc.)

How to use each is up to you.

If possible, I want to reduce waste and increase investment.