Some very useful improvisation links

YESand.com - Improv Info source that cannot be denied. Good articles and a really good forum to join and chat with other improvisors around the world.

The Spolin Center - This is the official Viola Spolin site. It has lots of good articles.

Improv Encyclopedia Home Page - games, handles, concentration exercises, drama techniques, character exercises, warm-ups, long form Improv formats, improvised show formats, tips for improv workshops and much more.

Learn Improv - Lots of Games, terms, help for creating a show.

The Improv Wiki - Interesting site where you can add information if you like.

The Living PlayBook - A big list of Improv Terms, and more importantly, games

Mick Napier's journal - A recording of the process of directing a Second City mainstage show, "Paradigm Lost" in 1997. Oh, and Mick is way cool.

Jeff Wirth - Jeff wrote a very good book called "Interactive Acting." It's not just about Improv, but it is interesting. He teaches in Florida, too.

Scotty's Improv Pages - Interesting set of notes from this one guy's experience in Second City training classes.

improvland.com - Community site with Games, articles, and a forum

Improv Resource Center - Some good articles and a message board.

the New Improv Page - A resource for the world of improvisational theatre.

The Improv Review Might be updated anymore, but has some good articles.

Comedyimprov.com - Good bits about Musical improv & film styles.

sheeridiocy - Games and Exercises

troupes.org - Listing of improv groups and performances in the U.S.

Improv Groups & Classes

Second City The original improvisors that made any money. Shows and classes.

The Groundlings The other long-standing group that feeds SNL. Shows and classes.

Upright Citizens Brigade NYC group with shows, classes, and once a TV show.