I like the way you think. Less Wrong has a culture, and a jargon (i.e., technical or artificial language specific to its culture). I don't mean that as an insult; I use it, so I'll work with it in producing content regarding to this frugality side of personal finance. That is, I can term it as 'optimizing expenditures', or 'cultivating a (set of) habits'. That may quicken in the minds of Less Wrong users the relevance of this information to rationality.

Of course, what we may find in the course of exploring money management is that Less Wrong itself can improve upon the advice of these websites for ourselves. That would be interesting.