We will communicate primarily via email. This is for a few reasons. First, it provides a written record of changes requests and requirements for your site. It also reduces that potential for misunderstandings since everything is spelled out - literally.
Additionally, all of my productive time is spent in front of my computer - and away from my phone. Therefore, my response time to email is much quicker than other communication methods.
Finally, anything we discuss on the phone I'll eventually ask you to write down, so it's just easier to skip the middle step.