Watch this video and take this free course to learn how to setup an autoresponder with Aweber. And start building your list and emailing monthly newsletters that are interesting for your clients. Then slip in your special promotion of the month. You will get more income every time you send it.
If you sign up with Aweber with this link I may get a small affiliate commission. I actually use them in my own business so I feel confident recommending them. Feel free to email me if you need any help setting up your Aweber email list as a Bonus for signing up through my link, I'm happy to help you get setup.