Anyone who gets my spam emails about concerts, knows that i'm a big fan of live music.  This handy tool has been very helpful in keeping me informed as to who's coming to town.  Credit to dwillens for showing it to me.

Do you use iTunes?
Do you like to goto concerts?
If so, you must download this iTunes Plugin.  Here's the developer's description.

iConcertCal is a free iTunes plug-in that monitors your music library and generates a personalized calendar of upcoming concerts in your city. It is available for both Windows and Mac OS X and supports worldwide searches.

http://www.iconcertcal.com/

You will love it. Your wallet won't.