I like
www.packinglight.com. (Use the "packing method"
link under "Help Center" at the bottom of the page.)
The system they use was developed by Warren and Gussie Holloway. Gussie could do a month out of one carryon easily, and look very fashionable doing it. They started a travel store serving the Sacramento area, which is now operated by their son Jon. Though Gussie passed away some years ago, the system has a life of its own.