We liked the guidance in the blog from Graham Cluley of Sophos on choosing passwords – see here. It is timely advice, given that a Sophos survey found that 33% of us use the same password for all our website accounts.
Alternatively, how about using a short two word phrase – convert the second word into numbers using your phone’s keypad.
Using a sentence or phrase as a memory aid is quite common. Users of Mark IV manifoil combination locks (standard locks in government and military secure environments) often use sentences together with letter tables (similar to keypads on mobile phones). It’s much easier to remember a sentence than a whole series of combinations!