Very often I need to print output of man page or save it to PDF, and I need results fast so I can continue debugging my application or whatever I am doing that needed me to browse man pages. If you want to print shell command output you obviously need working printer or if you want to create PDFs you need cups-pdf package(on Debian based distros use apt-get install cups-pdf as root or with prefix "sudo" if you are Ubuntu derivative user). As an example I will print to PDF ls shell command output:
man -t 1 ls | lpr -P PDF
If you are printing to real printer you would use its name instead of "PDF". Lets do the same thing with my printer named "ML-1620":
man -t 1 ls | lpr -P ML-1610
To print to default printer you just omit -P switch altogether like this.
man -t 1 ls | lpr