I like having a copy of that around as a quick reference when I'm having a brain fart about a particular function

If I was having a brain fart about a particular function, (e.g.: the order of the values returned by localtime) then I'd use perldoc with the -f (for function) option:

Not only would this be quicker than grabbing a book and locating the correct page, I'd be able to cut-and-paste the example code as well.