Good stuff, @jacor!
As @evan7 mentioned, I highly recommend RescueTime. I don't use it any longer as I have calibrated myself to manage time, but helped me greatly to reign it in. It'll examine the time for you - after all, maintaining an Excel spreadsheet and keeping track is a waste of time in itself :)
Thank you @liberosist
Rescue time for everybody! we can go to an elections with such slogan)