Yahoo tips for "exceptional performance"
Yahoo has just posted a list of 13 ways to improve the speed of your website. Some of them are ones we've discussed on here in the past (ake JavaScript and CSS External being a big one).
Some of the tips really only apply to very large sites, but the list is worth looking over to see if you can tweak anything to improve your performance.
Make Fewer HTTP Requests
Use a Content Delivery Network
Add an Expires Header
Gzip Components
Put CSS at the Top
Move Scripts to the Bottom
Avoid CSS Expressions
Make JavaScript and CSS External
Reduce DNS Lookups
Minify JavaScript
Avoid Redirects
Remove Duplicate Scripts
Configure ETags
Details about each item can be found on their site.