How to execute speed page load advance tips?

Google code, i have come to this page by page speed of firebug and i can see this how it is effecting my website not having DNS & parallelize downloads across hostnames. I don't know/understand how do i improve/fix this at my website server. This page only says what is causing problem, what is good to implement but doesn't says how to fix it, what i have to fix at my end to solve this issues. Please give some option/ways to fix in web server i am using iis 6
Thanks in advance.
Raj

in reference to: Minimize round-trip times (view on Google Sidewiki)