I have not done anything yet. Before I try the suggestions, I would like to understand a few things.

First, I have my bitcoins in my Armory Wallet. I have done the paper backup with the root key printed on it and stored it in a safe place.
If I ever lose my computer (hard disk failure) or my house burns  or whatever, with this piece of paper I can get back my wallet and the coins stored in it, right ?
Basically, with this key in my possession, if I need to create a 'new' wallet some day (on another PC), I will get the coins back from the blockchain directly... if I understand correctly, right ? 

This is what is called 'cold storage', isn't it ?