Oh, you can plan for the smaller shows. I just don't have the info off the top of my head. But there are lots of websites that do. Village Voice, Playbill.com, etc. I'm sorry I don't have more direct info, but I know that the info exists.

And, heck, Broadway shows are fun, too, and the TKTS booth can sometimes get you really interesting deals. (It's moved, by the way, so be sure to check that out.)