I’m enjoying Songkik a lot lately.
It allows you to track favorite artists and concerts nearby. And it seems to be aware of every single gig in the area. Just select your location, add artists you want to track (or import them from last.fm, Facebook or iTunes), and it will timely alert you about their concerts around you.
After setting this up, you’ll end up with quite long list of events for the next year. Screaming “It’s my favorite band! I want to go!” (probably) to every single one of them.
Cool stuff, check it out.