One of my favorite ways of telling that a link or idea is really worthwhile is that I find myself mentioning it fairly frequently after reading it. This has happened with
Tyler Cowen's Ethnic Dining Guide entry "General Remarks" where he goes over the basics of what makes a good ethnic restaurant. It includes simple economic rationales for how to choose the best ethnic dining like, "The best ethnic restaurants are often found in suburban strip malls, where rents are lower and the degree of feasible experimentation is greater. Small and cheap ethnic restaurants are often better than large ones." It's worth a read wherever you live (but especially if you're in DC which is where it's focused).
(Also on the food and economics tip,
Paul Krugman and
Stephen Dubner explore why food isn't so good in the UK.)