there are ways of remembering really long passwords that are really easy;
Take a phrase you know, a saying of some sort, put it all into one word, put capitals on the start of every word before you do so, then replace some letters with numbers or the words to/too/two with 2 and for/four with 4 and you can then easily remember passwords of 30-40 in length, you just have to get used to typeing them a little while.