Write down the 12 words ON PAPER. Never back up the words on the computer or take a picture.
Copy down a few receive addresses for sending your BTC to and reboot.
Copy down a few receive addresses for sending your BTC to and reboot.
Even better, write down the master public key, restore from master public key (not seed) on your online PC. Now you have a watch-only wallet with the ability to see all of your receive addresses, keep track of your balances, and even create transactions for the cold wallet (or "paper wallet") to sign.. but you still need those twelve words in your secure OS to sign the transaction.
