On a serious note, I have cracked the problem of remembering 'strong(ish)' passwords.
I just make up a sentence with around seven or eight words that includes some numbers. I often choose one relates to my personal life or perhaps the particular application. I then use the first letter of each word using all capital letters, punctuation marks and numerals.
e.g.
I have lived in Queensland for all of my life - since 11th/May/ 1941!
becomes IhliQfaoml - s11/M/1941!
If I feel that I need to record the password I just write down the first few words. That is enough to jog the memory without compromising the password.