If you're into laziness then you should consider my favourite CGI::Application plugin - CGI::Application::Plugin::ValidateRM. It's a wrapper around Data::FormValidator and HTML::FillInForm. I used to hate the tedious nature of validating user input and then writing the errors etc, but with this plugin all you do is define your validation rules in a hash, and it generates the error messages and represents the form with the original values entered. This has really helped my productivity.