Re: Never, never, never

[bofh_of_oz]

I would say: never never never do something strange and/or unusual in (with) Perl unless you're sure what you are doing (even if you just want to have fun)

As for "always", here is one I learned the hard way:
Always, always, always comment your code so that if you have to read it in three years, you would still understand what it is supposed to do...