There are two things to aim at in life: first, to get what you want, and after that to enjoy it. Only the wisest of mankind achieve the second. - Logan P Smith
Know what’s worth doing
One of the many things I wish I had learned sooner in life is the ‘Pareto principle,’ usually called the “80/20 rule.”
The principle is the observation that 20% of activities lead to 80% of your success. In other words, most of what you’re doing is essentially a waste of time because it doesn’t contribute much to what you want to achieve.