Must Dos, Courtesy of Samy Kamkar

(in Tools of Titans, T. Ferriss) :

Music for the Zone : audiomolly, Glitch Mob, Infected Mushroom.

Depending on your role in the world, you might consider putting tape over your laptop's camera.
Use BitLocker or FileVault (Tim Cook OS)
Use "You'll Never Take Me Alive" (thank God Ross U didn't know about this one)
Use an eight digit PIN on your smartphone.
Use VeraCrypt to create hidden volumes known only to you - where you keep your sensitive data.
Use NetLimiter on Win and Little Snitch on Tim Cook OS.
Never plug in someone else's USB stick into your computer (If you care about your computer).
Use Tor, not VPN.
Disable geotagging of your photos on your smartphone.
Use Chrome Developer Tools (Network and Elements Tabs).
Google Reverse Image Search.
Learn to use Wireshark (Laura Chappell would agree :)

You++