download the webpage
https://www.bitaddress.org/take your computer offline ( remove the internet wire )
load a linux live boot cd/usb.
print out a public/private key pair using that bitaddress webpage.
you've got yourself cold storage.
I also suggest you this however can't understand what it mean by linux live boot?
You can use your old pc/laptop which can function but you never connect it to internet. Just use it to generate paper address and print it in offline printer. Than you can format that old pc and never connect it to internet.
Although You need to take care of that printed paper wallet and store it in some safe place protected form water, fire and obviously no one should have access to it.