Use a pass phrase instead of a password
It works similar to CodeCurmudgeon's suggestion. Take a relatively short sentence that you can easily remember, remove the spaces and use that as your password. Select a sentence with punctuation to add symbols if you like. Make is kinda long and maybe mix the case a bit. Like this:
ILoveMyLittleBrownDog!
or
BestFriends4Ever!
In answer to kwabinalars's concern about not using symbols I have to ask: How would the hacker know you didn't use symbols? He'd have to check all of them anyway and this would make his search take just as long. Because he doesn't know each character of your password he has to test every POSSIBLE character whether you used it or not. If it ever caught on that nobody ever used symbols he could guess that you didn't so he could skip testing them.
