Last year I completed a course called 'Email Marketing Made Easy' by Natalie Alaimo (http://www.nataliealaimo.com/). I chose her course because I like the way she structures her content in a step by step way.
She makes the following point which resonates with me: "Passion alone doesn't get you the income and sales you need. It's likely you need some structure and a system."
She outlines how to create a series of emails that are automatically sent out to people who have given you permission to email them, for example by attending your webinar or downloading your free guide.