Well, as long as getting another and more challenging job is not a recommendable option in general I'd like to suggest a few very simple things.

• register at perlmonks.org hey, it's free and makes directing criticism at you much easier :-) And when looking through the reputations and answers to your posts you get a quite good picture of the picture others have of your skills. Here is the funny part: How long do you need to make it to a "saint" without XP-whoring? grin
• post your code snippets and ideas you'll be surprised how a lot of these "oh, how did you do that?" will turn in "why the heck are you doing it in this way ?... 1 - its insecure 2 - this would be faster 3 - this ... 4 - that
• join a perlmongers group and besides having companions of equal skills you don't have to get drunk alone grin
• play it like a game, for example register with afree or nonfree certification service and try to solve the Perl and Unix related courses with the highest ranking possible.I do still not know how some made it to pass the brainbench cert with 5.0 and sorroughly brainbench is not as free as it once was
• join perl conferences benear you or all over the world

It's so easy (to say) :-)
Ok, to put it in another way: If you're on top of the mountain just look for the next higher one.
If you can't see a higher mountain, then leave the top and try to reach it again whilstt walking at your hands. Only recommended if you are really bored

Have a nice day
All decision is left to your taste