A lot of businesses think that they can do it all by themselves. Some have told me that they do not have a "back office".
(definition: back office - any department or office, as a private office or a department of record keeping, that is not usually seen by outsiders).
Based in the definition everyone that has a business has a back office. Any/All tasks that has to be done to keep in touch with your Clients, make appointments, follow-up with Clients & potential Clients. Keep in mind what ever you do, don't forget about those small things that is a part of your business and being a success.