If I had a weeks supply of beef jerky, or the nuts that Longo's commercial plan relies on, I'd eat it all on day one.

I think I could probably make a go of this if I just stopped off at the dollar store, and bought little packets of jerky and nuts, a day's worth at a time, rather than keeping them in the house. That extra step of purchasing versus having and portioning out seems to make a big difference for me.