Additionally, by learning to use other languages, and especially other types of languages (Lisp/Scheme, for example), you will also gain experience that can help you use areas of Perl that you may be unfamiliar with, and be able to utilize the chainsaw even more effectively.

But, in general, don't be afraid to diversify. By being able to identify the strengths and shortcomings of your favorite tool, you can utilize it in such a way as to minimize "injury".