ASP.NET applications scalability best practices guide

Question

Is there are a guide published by microsoft or somebody else about the best practices for creating scalable web applications? like patterns to use and how to do data access.

Answer 1

The best advice I can give is to do these three things (roughly in order):

1. Avoid unnecessary postbacks
2. Avoid excessive viewstate
3. Spend your time optimizing your database

Answer 2

The Microsoft Patterns & Practices group is a good one stop shopping ground for that.

Edit: Here is their guide specifically on Scalability and Performance. Chapter 6 includes information specific to ASP.NET Performance and Chapter 17 includes information about Tuning.