1) Create an email that is easy to search for and says who you are and what you do. Don't try to be clever, be clear. i.e. firstname.lastname@example.org
2) Create a writer website -- use a free service like Wix. Let fans know about you and your books. Give them a place that they can contact you and buy your books. Give away something for free on the website -- first chapter, short story, illustrations. Great way to acquire emails to add to your fan base. i.e. I am giving away a short story from my collection that will soon be published on my website www.samingraffiawrites.com.
3) Add your website URL to the "signature" at the bottom of your emails.