How to Really Use the 80/20 Rule

"Pick an area of your life where you feel there is an imbalance of effects. This won’t be true of all areas, but many situations are out of balance (money, time, health and possibly even relationships).

"Try to identify the key 10, 20 or 40 percent of inputs that are creating most your results. This could be the 10% of time that creates the most returns. It could be the 40% of relationships that create the most happiness for you.

"Find ways to emphasize the key percentage. Spend more time in those activities. Place them first in your schedule. Meet up with your key friends more often. Invest more of your money in the best expenses.

"Find ways to downplay or eliminate the rest. Get rid of activities that don’t have a high payoff. Stop spending time in relationships that don’t create enough value. Stop wasting money on investments that aren’t giving you a greater quality of life."

From this post from lifehack.org