I'm currently running an Ubuntu 12.04LTS with nginx handing out requests.
I ran my site through google page speed (https://developers.google.com/speed/pagespeed/insights) and the main tip it had was to Improve server response time, but it doesn't give much detail into how to do this.
It mostly just listed off some webfonts I'm using (css @font-face) and a couple of images small png's and a gif.
Any suggestions on how to do this?