Of course, there is no better thing than having your code scanned by the Perlmonks' Mark 1 Eyeballs, but if you are in a hurry or want to have some automated critique, did you think of using Perl::Critic? It applies Damian Conway's Perl Best Practices and although not everyone agrees with all his ideas on the matter, it goes a long way in showing the most obvious (and some not so obvious) dos and don'ts of writing good Perl code.