1. Turn off notifications for the Facebook app on your phone;
2. Turn off notifications for the Facebook Messenger, Instagram, et cetera apps on your phone;
3. Delete the Facebook app from your phone;
4. Delete the Facebook Messenger, Instagram, et cetera apps from your phone; and finally
5. Log out of Facebook on your desktop.
It took me 2 years to go through from step 1 to step 5. It has made me happier and more productive. I still have a Facebook account. But the friction of grabbing my laptop and logging in forces me to consider "is this what I want to do? Or am I thoughtlessly reaching for the crack pipe?"