!! Carefull with partial spend from cold storage (with myceluim partial spend from cold storage not even possible)!!
As remain can get sent on change address which I asume most don't control private key off. So study and think twice always before do... Just my 2 steems:)

• One is safe with wallet.dat file-many many usbs :)
• Dump wallet & print out-coulpe of prints :)
  And after print you can manualy create offline QRs.

https://en.bitcoin.it/wiki/Cold_storage
https://en.bitcoin.it/wiki/How_to_import_private_keys