in reply to
How do I train myself to write more Perl-ish Perl, rather than C-ish Perl?
You have to like the Perl-ish way. You have to like what Perl-ish way is changing within you.
You have to have the conscious knowledge that Perl-ish way is better in what you are trying to achieve.
You need probably a lecture or video-series to explain your mind that how 'you' can do better with Perl-ish way.
Have you heard a story about a master, who told that it will take more time to learn Guitar if you already know Piano compared to total novice? Your situation is like that currently.