How to improve the performances of ASP.NET MVC web applications

Today I stumbled upon a nice presentation that Rudi Benkovic gave last week at the Slovenian DotNet User Group, about ASP.NET MVC Performances. It is an in depth analysis of a Digg-like site and how it went from serving (on a test machine) 6 req/sec to 390 req/sec. The analysis prove the usual rule of performance optimization: no matter what you do to optimize your code, the biggest performance hit is data retrieval, and the first thing you have to optimize is always this. But apart from this obvious outcome, I just want to take out from this presentation the 3 point that are really specific to ASP.NET MVC