The awesomeness of the Albahari brothers (Joe and Ben) is well-known, only slightly less well-known than the awesomeness of the tools from Red Gate, in fact. Now my friends at Red Gate are promoting their ANTS Performance Profiler with a free O'Reilly eBook from Joe and Ben. How great is that?! I'm not sure how long this promotion will last so download the book while you can. And check out the ANTS Performance Profiler while you're there. I use this tool routinely to make my code tighter and faster. It's one of those must have tools that .NET pros should have on the bat belt.