I am oftentimes surprised by how few self-identifying hackers use end-to-end encryption like PGP/GPG.
Many of us use clients like Thunderbird already, which make GPG setup and use rather simple. I set up GPG on Thunderbird for my dad (who is a complete Luddite) - it took me <15 minutes, and he's been using it to email with me for over a year.
I encourage everyone reading this to set aside 15 minutes to set up GPG encryption and send a GPG-signed/encrypted email to a friend[0]. You'll see it's not so scary, and this is one of the single biggest things you can do to protect your privacy online.
[0] If you don't have any friends with PGP keys, feel free to email me. :)