Double-check your email blast. After you've written your email blast, you should go over it again for grammar and spelling errors. An excellent way to help you edit your email is to send it to colleagues to ensure that there aren't any factual or grammatical mistakes, and to make sure that the messaging stays on brand. Ask people on your team to look over your blast and provide you with feedback.
Update your website and continuously offer useful and updated content. Think of your website as a storefront but in the virtual world. In the same way that you do not leave your physical store unattended for a month, you would not do the same to your website. Always update your website and keep it fresh by having a blog, announcing sales, special offers, and new products. Think that you are a customer yourself, so give them the information that they want.
The recipient of your email blast is unlikely to commit a lot of time to reading what you send. If you keep the content short, make it easy to scan and easy for them to digest, it will be a much better value for both of you. Aim the content toward providing the reader with enough info to get them interested and then encourage them to follow the links to learn more.
Particular groups of customers can be targeted or even individuals. Offering individual customers special deals on merchandise and/or services on the customer's birthday, for instance, is one example of email marketing personalization. (A restaurant might send an email to customers on their birthday offering 50% off an entree,) Email marketing helps a business develop and maintain a relationship with a customer over time that hopefully results in increased sales and increased customer loyalty. 
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