OP - in addition to the advice above, I'd like to point you to the concept of a modulino. If you're doing mostly scripts, this approach will allow you to walk the line between scripts and modules (libraries). Which is good for "code reuse" when it makes sense. I also highly recommend you take a look at Util::H2O. It is great for cleaning up old crust scripts that heavily use hash references (the sign of a mature Perl developer) and can make your modulinos even more pleasant to work with.

Finally, I must also point out. A lot of times it's okay to use bash. I maintain a mix of Perl and bash scripts; your tolerance and own needs will guide you where the "line" for that decision is.