It costs roughly five times as much to attract a new customer than to keep an existing one. You need to make the most of marketing and selling to your existing customers. A great way to do this is to tell existing clients about new products, services and promotions you are running by using your email signature as a marketing tool. One of the best people I know at doing this is Logan Sutton from Future Grafix. Check our his email signature below from just before Christmas, advertising his Xmas deals.
It does not take a lot of time or effort to do this. You can create a link back to your website where people can order thru a form or as a product if you have e-commerce installed. Its a real quick win. Feel free to give us a call if you need a hand setting this up.