The #80PercentRule Is the Secret to #Maximizing Your #Productivity, According to #Google's Top #ProductivityGuru
Fill only about 80 percent of your days.
Leave 20 percent open to absorb whatever craziness comes up.
This way, you have time to think clearly and stick with your priorities.
https://www.inc.com/jessica-stillman/80-percent-rule-secret-maximize-productivity-google-guru.html
The 80 Percent Rule Is the Secret to Maximizing Your Productivity, According to Google's Top Productivity Guru

No scheduling hack or time management system can help you if you're not following the 80 percent rule.

Inc.