So there is a very good article that came out in the April 2008 issue of the MSDN Magazine, Scaling Strategies for ASP.NET Applications. The main things in this article are:
Scaling ASP.NET Applications and databases
Optimizing code
Using efficient caching
Affinity and load balancing
One of the most useful things I found about the site is the analyze tool. This site will look at your web site and give you detailed analysis of your page. Telling you things you can do to make your site have better performance. The types of things it talks about are:
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