The text below is taken from the post Take the 2015 CPAN Pull Request Challenge. Seems like a nice way to encourage involvement:

"If you join the CPAN pull request challenge, then at the start of each month in 2015 you'll be emailed a (somewhat) randomly selected CPAN distribution. You'll have one month to submit at least one pull request. You don't have to be an experienced Perl programmer, CPAN author, or githubber. The goal is to help others, possibly learn something, and hopefully have a bit of fun."