|Perl Monk, Perl Meditation|
Personally, I find I learn more when I use tools to solve problems I haven't tackled before. Perhaps you should look at the work you do and the tools you use to do it. Perhaps you'll identify a problem you can tackle.
Barring that, perhaps you can think of a project that you have wanted to attempt and then give it a whirl.
Perhaps you can think of a module you've always wanted to have.
Perhaps there's a project you've always wanted to redo.
Inspiration can come from many places; you just have to be open to hearing the voice urging you to take a crack at something.
As always, YMMV...