As for good ways to create CPAN modules, some relevant PM nodes are:

• José's Guide for creating Perl modules
• Best Module Starter?
• How to make a CPAN Module Distribution
• Simple Module Tutorial
• Writing Solid CPAN Modules

Some external references:

• Writing Perl Modules for CPAN, book by Sam Tregar (free download should be available too)
• Guide to Creating Perl Modules by Ken Williams
• Perl Module Mechanics by Steven McDougall
• Making Perl Reusable with Modules by Andy Sylvester
• Making New Distributions by brian d foy (using Template Toolkit)