I downloaded an app called Kill Facebook News Feed and my productivity has skyrocketed. It literally kills your news feed when you log in to Facebook. Now we just need a mobile version.
On my iPhone, I took a few minutes to turned off nearly all push notifications in Settings. I also make it a habit to turn on Do Not Disturb mode for most of the day. If there's anything urgent, people can call twice to bypass Do Not Disturb.
Then comes the anxiety of 50 new spam emails in my inbox every day. I used Unroll.me to unsubscribe from over 200 email lists that I don't care about. (Side note: Unroll.me recently came under fire for selling customer data to Uber, so use with caution).