80 percent of your outcomes come from 20 percent of your inputs

It really doesn’t matter what numbers you apply, the important thing to understand is that in your life there are certain activities you do (your 20 percent) that account for the majority (your 80 percent) of your happiness and outputs.

… start being creative and giving back – produce output! You won’t find fulfillment only by consuming.

Source: http://www.entrepreneurs-journey.com/397/80-20-rule-pareto-principle/