Once you've got the leads and enquiries into your inbox, you may still have to close the sale, or if you have an ecommerce website you'll need to maintain open communication with your clients.
A cost effective and very profitable way to do this is by sending emails to people who have asked for more information about your services or to people who have previously made a purchase from you.
Whenever I send out an email to any of my clients' list's of customers they always make sales in the days and weeks afterwards all because of one email.
Imagine being able to contact thousands of people who have asked for more information about your services at one time or another. You really should be doing this as there could be alot of money left on the table.
