I firmly believe we all waste way too much time on social media. Now, I have proof. Since Saturday night, I’ve wasted almost 6 hours of my life on Facebook.

How do I know? Thanks to WasteMyTimer.com, which was built at Startup Weekend Amsterdam (my recap and learnings detailed here) by Francesco Mattia and his team.

Every time I see that timer ticking in the upper left of the screen, I shut off Facebook and go do something productive. It’s true, knowing (and proving it) is half the battle. Thank you for the realization, Francesco.

[Update 7/20/2012: I’m now approaching 14 hours of wasted life]