I have trouble remembering passwords for so many sites. I have a password that works for everything (upper case/lower case, numbers, letters and a punctuation character, 8 characters long) but it's not safe to use the same one on everything, so I'm going to be changing them this week. I'm thinking of creating one that has all the necessary characters, but varies by one character, based on the name of the site. Like "F07896a!" for Facebook and "M07896a!" for mumsnet, etc.
I still think someone might figure out the system. What do you do?