Check out CGI::Application. For the web application I've been designing, its use of a single instance CGI script passing "run-modes" to the module has really helped me organize the application into logical sets of functions for each page. The documentation is pretty straightforward, IMNSHO, as well.

-rattus

__________
He seemed like such a nice guy to his neighbors / Kept to himself and never bothered them with favors
- Jefferson Airplane, "Assassin"

update: whoops, left out a word