Responsive HTML Email Design

 Probably can't show too much from this Pluralsight course but check it out before you write any emails.  Great course to get you in the right mood to send emails. 

Responsive HTML Email Design

http://app.pluralsight.com/courses/responsive-html-email-design

By Justine Jordan and Jason Rodriguez

Slides / Worksheets

http://litmus.com/lp/frontendmasters

https://litmus.com/builder/5320ab5 - Completed Design

https://www.campaignmonitor.com/css/