StumbleUpon.com: Personalized Recommendations to Help You Discover the Best of the Web Anyone use this site? It's fucking awesome, especially high. I use it a lot when I'm bored. I've learned so many rad facts and stuff from it. I highly recommend it. To explain what it is, basically you just pick from a list of your interests, then click the "stumble" button, and it randomly jumps to a site within your interests. Very cool indeed.