How to create a strong password you can actually remember

Use a passphrase. Three or four random words strung together, like 'purple-tiger-notebook-lamp'. It's long enough to be secure, random enough to be hard to guess, and easy enough to remember. Never reuse the same password on more than one website.

A strong password is long, unpredictable, and unique to each account. The easiest way to create one you can remember is to use a passphrase. A string of three or four random words. This gives you a password that's 16+ characters long (which is very secure) without needing to remember a jumble of symbols. For accounts you don't need to type regularly, use a password manager to generate and store truly random passwords.