
* The Pragmatic Programmer, by Dave Thomas & Andy Hunt
* Scalability Rules, by Marty Abbott & Michael Fisher
* Release It!, by Michael Nygard
- Scalability Rules: 50 Principles for Scaling Web Sites by Martin L. Abbott & Michael T. Fisher
- Building Scalable Web Sites: Building, Scaling, and Optimizing the Next Generation of Web Applications [Paperback] by Cal Henderson
I think they are the best resources I have found about the topic. If you are using .Net, like me this is book has good tips as well:
- Ultra-Fast ASP.NET: Build Ultra-Fast and Ultra-Scalable web sites using ASP.NET and SQL Server by Richard Kiessig
"Rework", by Jason Fried and David Heinemeier Hansson
"Web Design for Developers", by Brian P. Hogan
"Scalability Rules", by Martin L. Abbott and Michael T. Fisher