"Best practices" are difficult to define. As soon as you define them, they are trumped. This is because to define a "best practice" allows observers to immediately start improving and iterating on them. Thus, best practices are moving targets.
With that preamble out of the way, there are definitely ways of operating a professional services business that everyone should strive to achieve. Whether it's creating more value-driven offerings or reducing the risk in fixed-bid projects, we can all identify practices that should be explored and potentially adopted.
This forum is for the open dialog and debate about what these best practices are, and serves as a living conservatory; documenting the evolution and growth of these practices.