Not to mention if you use your editor right it literally is boiler plate; I use yasnippet but even other (*cough* inferior :) editors have similar functionality. When I open a new file and get a buffer in cperl-mode all I have to type is "script" then TAB and I get a script ready to go with my cursor sitting at where the $0 marker is (the header before the comment with -- being removed of course, and depending on the use of a version greater than 5.10 to turn strict on).

# -*- snippet -*-
#name : perl script
# --
#!/usr/bin/env perl
use 5.032;

$0

exit 0;

__END__
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