This FAQ section has more detailed information, but my overall approach is:

• As soon as I have a complete description, in writing, of what you want in your website, I can build it.
• My preferred form of communication is email.
• I charge by the half-hour, and always round down.
• Invoices are sent at the end of the month, and are due upon receipt.
• For any sizable project, prior to my getting started, I need a deposit of 50 percent of the minimum estimated cost of the project. Once a client has made a few payments, no further deposits are needed.
• Because of my years of experience, I'm able to complete tasks faster than most developers.
• Clients often comment that they find me extremely responsive, and that's partly because I work seven days a week, so I'm almost always at my computer.