You can have an email subscription opt-in on your blog that your readers can subscribe to. This will keep you in contact with potential customers who may have not decided to use your business yet. By staying in contact, they will remember you and how to find you when they are ready to move forward.
You can also email them promotions such as discount codes and sales you are having. This is especially great for product based businesses and service based businesses.
Another way you can stay in contact with your potential customers is with weekly or monthly newsletters. You can send automatic emails to your audience every time you publish a new blog post, add a new item to your shop, or have any events planned.
Using email campaigns is a cost effective way to market your business.