Perl Style: The Care and Feeding of Modules

Document your modules with Pod. Test your pod with pod2man and with pod2html.
Use the Carp module's carp, croak, and confess routines, not warn and die.
Well written modules seldom require ::. Users should get at module contents using an import or a class method call.
Traditional modules are fine. Don't jump to full objects just because it's considered cool. Do it only when the occasion obviously calls for it.
Access to objects should only be through object methods.
Object methods should themselves access class data through pointers on the object.