Lifehacker has an interesting article called Four Methods to Create a Secure Password You’ll Actually Use and I’d like you to read it, but I’m also amused how old-fashioned the whole idea seems to me.
Because I use 1Password. I can barely remember any of my very many passwords, not because they are all very strong ones but because I don’t need to. They’re all in 1Password and right there, securely, when I need them.
But if you don’t use 1Password or any equivalents, check out Lifehacker’s article because you need stronger passwords than you’ve got now. You do.