Sam Ruby on REST:
Mark Baker: Figure out what are the identifiable objects in your system, give them all URIs, and make sure they answer GET requests. Much of REST will flow naturally from that. That is a good first step. The next step is to agree on common representations. Sometimes consensus can be reached on these representations, and that is goodness. Otherwise, extensibility and/or discovery mechanisms may be helpful in providing the right amount of coupling.
You want to catch my interest? Say it in on a weblog.