- Developing High Performance and Scalable ASP.NET Websites
- Avoid Chatty Interfaces Between the Tiers in Your ASP.NET Web Application
- ASP.NET Page Profiling - Page Tracing - High Performance and Scalable ASP.NET Websites Made Easy
- Web Applications: N-Tier vs. N-Layer - Benefits and Trade-Offs
- Query Analyzer - Sql Server Database Indexes and Execution Plans
- High Performance ASP.NET - Speeding Up ASP.NET Pages
- Website HTTP Performance Tuning using Fiddler for High Speed Websites
Here are posts about other resources to help with ASP.NET Website Performance: