Complex sentence: You should have your passphrase ready before creating your PGP or GPG key or opening a new Hushmail accountas'inventing' a passphrase whilst entering it is a poor practice, very likely to lead to poor passphrases, and so to poor security.
Split into simpler sentences: You should have your passphrase ready before creating your PGP or GPG key or opening a new Hushmail account. 'Inventing' a passphrase while entering it is a poor practice, very likely to lead to poor passphrases, and so to poor security.