Generate a 36x36 matrix of random (password suitable) characters indexed along ordinate and abscissa with a-z0-9. Two things to remember: a two character key to a password (e.g. 'am' for amazon, 'w3' for a third work related password) and a scheme for tracing a path through this tabula recta[1] following after the first character indexed by the key (e.g. spiral to the left until 12 characters are accumulated). Make two copies of the same matrix, put one in your wallet and the backup in your safe deposit box [2].

[1] https://en.wikipedia.org/wiki/Tabula_recta

[2] http://lifehacker.com/5715794/how-to-write-down-and-encrypt-...