When people talk about email marketing, lots of them forget to mention transactional emails. These are the automated emails you get in your inbox after taking a certain action on a website. This could be anything from filling out a form, to purchasing a product, to updating you on the progress of your order. Often, these are plain text emails that marketers set and forget.
One of the downsides of email marketing is that you are only able to reach the contacts that you already have. However, you can use social media to help you grow your email marketing list so that you have an even larger audience for your holiday sales. One way to do this is to promote your opt-in offers across your social media profiles. Consider offering some sort of incentive for joining your email list, such as a special coupon code.