How Early Do You Pack?

I typically begin to pack about a week before we leave on a trip. Packing a week early gets most of what I need set aside so there is last minute washing (except my last 2 trips where I was drying clothes right up to when we left). Packing early also allows me to go through my list checking things off to see what is left or any last minute trips to the store.

This time, however, I'm getting the itch to pack much sooner. Because it is so out of my routine it feels strange. We typically drive the 12 hours so we are on an open schedule. This time we are flying. That means the schedule feels tighter so we have to be organized arriving and departing.
How early (or late) do you start packing?