The Where When Project.

This is an interesting site;

The Where When Project describes itself as an endeavor to create the most comprehensive calendar of current and future events in the United States.
(And by the looks of the site I think they have done a pretty good job).
There are listings of all kinds of shows, festivals, concerts and performances, from local stuff to world class events from Automotive to Extreme Sports, Food, Music, Film and Family.

This is a great way to find out what is happening around your area (you can even sign up for free to get details emailed to you).

For us as musicians and being keen on the music / art / performance scene it's an excellent way of keeping track of our favorite bands and performers and getting those tickets early.
Events are also a brilliant way of meeting new contacts (It's called networking) and getting inspiration (plus a day or two away from the usual doesn't hurt).

Drop by the site and do a search for your area and see what's on (or even better still, plan a road trip with some friends and go interstate!)
www.thewherewhenproject.com