Email marketing is a strong tactic to improve customer relationships, grow business opportunities, and so is every single email you send.
I really like including a vCita call-to-action button everywhere possible, including my email signature, newsletters and Facebook campaigns.
Have your clients and potential clients schedule an appointment, pay for a service, upload a sensitive document and other things 24/7... when they're thinking about you, and you might not be thinking about them.
Simply click here, and copy the "Grab your link" link, and paste it in your email. You can also select other actions you would like them to take.
All this from your email signature.