I am at last happy to devise complex and very different passwords without fear of forgetting them later. A small size and discreet, it looks like a plain black notebook or diary. Has organised my former dilapidated notebook with passwords old and new and haphazardly arranged into one alphabetised and structurally sound format - wish I'd bought this ages ago. As I have often felt about address books, a Filofax version would be good so that pages could be replaced &/or added but I think this will do me for a few years anyway.
One thing - I keep all my bank passwords etc in my head and never store payment details on my websites. This way if my book should ever get into the wrong hands it would be of little use to a thief.