If necessary I use ppm, but as I have a minicpan on the harddisk of my laptop, I tend to use cpan first, especially when I am on the road and may not have a reliable connection to the internet.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James