Post date: Feb 28, 2014 9:12:15 PM
Google has posted an interesting interactive page that will find the trends that best correlate with any line you draw. Pretty hard to forget that correlations mean nothing about causality when you are matching things to an arbitrary line!
Interestingly, there is a way to upload your own data (rather than sketching a line) and looking for things that correlate with it. The main page for google correlate, where you can do this, is here: https://www.google.com/trends/correlate/
Perhaps fodder for your upcoming projects.