After you use the aforementioned methods for accessing the module documentation (via the command line or on-line), if you still find yourself craving more information, you can use Super Search here at the Monastery. For example, if you search for File::Find, you will probably get:
More detailed examples of usage scenarios.
An idea of the module's limitations in practical situations.
Opinions on where and when it is best to use the module (or avoid its use).
Suggestions for alternate approaches.
In some cases, it will be more than you ever wanted to know about the module :)