I use the following bash script to automate this task:

#!/bin/bash

file=$1

if [ -e $file ]
then
        vim $file
else
        touch $file
        echo '#!'`which perl` > $file
        echo '' >> $file
        echo 'use strict;' >> $file
        echo 'use warnings;' >> $file
        echo '' >> $file
        chmod +x $file
        vim $file
fi
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