I typically work on freelance projects during evening hours and on weekends.
I like to make initial contact with a client via telephone to discuss the general direction of a project and take notes on any highlights or talking points necessary to prepare an initial draft.
After an initial draft, I prefer communications about further instructions, comments or thoughts regarding a project to be via email whenever possible. This approach allows me to have something in writing directly from the client regarding feedback on the initial draft.
I currently create a draft for copy writing/editing in a word processing program, then attach the file to an email for the client. If I'm working on the layout/design of a graphics-based project, that will be converted to a PDF file, or uploaded to a client web site that I maintain for viewing web projects.