I currently run 6 small websites across a variety of industries (consulting, software-as-a-service and 4 e-commerce businesses).
We will obviously go into detail once I select you, but here is a sample of the types of tasks that would need to be done.
1) Manage inbox for customer support, client support or responses to a project campaign we are running
2) Document any new tasks in the playbook
1) Get reports prepared for clients
2) Prepare agenda email for each client
1) Invoicing for clients
2) Pull in data to check the performance of all businesses
For the consulting that I do, a big part of the work is trying to establish relationships with people all over the web. As they respond to our emails, we need to be prompt with our replies and organized so we don't drop the ball with anybody.