Upgrade your browser!!!
One of the applications I just delivered at work ran into a "performance issue" today, and in researching the explanation I came across this nifty little chart, courtesy of Microsoft. High numbers are really, really bad and if you use sites like Facebook, Gmail, Twitter, or pretty much any other site popular today it probably would perform much better if you used Internet Explorer 9.0, Firefox 6, Google Chrome, or Safari instead of Internet Explorer 8.0. So, as a friendly reminder to any of you non-tech readers, go upgrade your browser!
http://ie.microsoft.com/testdrive/benchmarks/sunspider/Default.html