Source: How do frequent emails and texts affect productivity? - Barking up the wrong tree
The secret number is 420. Times 3.
What are the 5 steps for changing bad habits into good ones?
How can you stop e-mail from taking over your life? - Barking up the wrong tree
What 3 tricks will get people (including yourself) to do things right?
How to easily increase willpower and improve self-control: