This is how you do it:
1. Buy a hardware wallet
2. On it, generate a wallet from a 24-word seed (or fewer words)
Extra steps for the ultra paranoid:
-. Format (reset) the hardware wallet, then restore it from the 24-word seed.
-. Test with a small sum that you can receive and send Bitcoins from your new wallet.
4. Create a story which can help you remember all the seed words in order (this is a mnemonic technique, http://www.vocabulink.com/article/how-to-write-a-memorable-mnemonic-story)
5. Memorize said story, test yourself that you know it after 4 hours, 1 day, 4 days, and after that weekly.
6. After one month, format (reset) the hardware wallet, then restore it from the 24-word seed that lays in your memory.
7. If you've been successful until now, move your funds to the hardware wallet, then format it again and throw any recording of the seed words that you might have laying around the house.
Your savings are safer than ever now.