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You could use a CDN - I personally use MaxCDN. This would host your JS/CSS/Image/PDF types of files and deliver them to the user faster than your normal web server will. Here's how to connect MaxCDN to Magento if that's the CMS you're on: https://www.maxcdn.com/one/tutorial/magento-cdn/

this tool will allow you to add your CSS files as well as your JavaScript files and then you can combine them dramatically reducing your calls to the server therefore also reducing your DNS requests. please run your site through this tool as well http://www.feedthebot.com/pagespeed/ below are tools that will help you combined your JavaScript & your CSS http://refresh-sf.com/ http://skalman.github.io/UglifyJS-online/ Here's the CSS tool http://www.feedthebot.com/tools/css/ information on Java script http://www.feedthebot.com/pagespeed/combine-external-javascript.html

PS here's an update I ran it out of California as well http://newrelic.com/synthetics_previews/7b161fb0c45f0132e6e800505682a6e4 446 msCONNECT305 msSSL1 msSEND490 msWAIT3 msRECEIVE938 msTIME TO FIRST BYTE