How to encrypt and decrypt your Bitcoin wallet
If we run a public Bitcoin node and we do not want it to contain our private keys, but we want to track our addresses anyway, we can create a wallet with no private keys:
bitcoind: How to create a wallet with no private keys
Do not use Paper Wallets
Storing bitcoins
Securing your wallet
How to set up a secure offline savings wallet
Wallet passphrase generation and strength
Passphrase generation (bitcoin.it)
(bitcointalk) How long, strong should a bitcoin wallet pass-phrase be?