HTTP tuning

I often have to modify the performance of the HTTP side of the conversation and here is a link to a decent basics:

Best Practices for Speeding Up Your Web Site

I also like the fact they used IBM's Page Detailer http://alphaworks.ibm.com/tech/pagedetailer which is an awesome application my colleague performance whiz Phil Theiller showed me. It is really awesome for getting a good visual feel for the HTTP side of things.