I have recently made a new client area that clients can log into to see the progress of their current works in progress. It also enables the client to view all of the previous jobs that I have done for them and view their hosting and domain names plans to see when they are coming up for renewal. The client area also has an invoice management system, which enables you to upload the invoice to the server and keep track of any outstanding invoices.

The client area also includes a message board for the clients to communicate with me, keeping all correspondence in the one easily searchable place.