waterdesign
Recruit the supporters you need. Perhaps on here or meetup.com. Plan a WF trip some place warm or have one in your town where you can meet regularly and offer mutual support.
Sure support from a retreat is great, but I find most of the dedication that goes into a WF is mental. What fuels your mental strength are your thoughts, so what you feed your mind with matters a great deal. When I've done longer WFs, I've spent hours reading forums such as these to keep my motivation up.
Motivation is like taking a shower. You need to do it daily.