Get your friends involved
This is the single biggest thing you can do to promote email encryption.
Before you close this guide, use our sharing page to compose a message to a few friends and ask them to join you in using encrypted email. Remember to include your GnuPG public key ID so they can easily download your key.
It's also great to add your public key fingerprint to your email signature so that people you are corresponding with know you accept encrypted email.
We recommend you even go a step further and add it to your social media profiles, blog, Website, or business card. (At the Free Software Foundation, we put ours on our staff page.) We need to get our culture to the point that we feel like something is missing when we see an email address without a public key fingerprint.