It's important to be in front of your customers as often as possible in many different way's. For example, you can send thank you emails, seasonal newsletters, update Facebook content and tweet every day about your sales and new products.
Discount coupons are fantastic for prompting potential customers to visit your site. Who wouldn't at least take a look at your products if they could get 20% off their order?
Segment your customer base and know your repeat buyers. Take advantage of social media outlets
Be sure to include your company’s website on all communications!