I've never encountered a well written business layer. Any advice?

Question

I look around and see some great snippets of code for defining rules, validation, business objects (entities) and the like, but I have to admit to having never seen a great and

Answer 1

Neither have I. We don't create a business layer in our applications. Instead we use MVC-ARS. The business logic is embedded in the (S) state machine and the (A) action.