A lot of the past and upcoming articles on AskApache are focused on speeding up a server or website, or just making things more efficient.
I find it hard to imagine ANYONE who is cool enough to be on this site would NOT already be using Firefox and Firebug.. That goes for my favorite people too, unix/linux/bsd geeks, these are so helpful for web development and all the fun stuff we do.
I'm starting several speed tip articles that require the following 3 programs if you want to follow along, that is... if you can keep up! ;)
YSlow analyzes web pages and tells you why they're slow based on Yahoo's rules for high performance web sites.