If you want a strong password, that isn’t too hard to remember, try out http://www.safepasswd.com/

If that’s still too difficult for you, try picking a song or phrase you like (with a title that is at least 8 characters long) and replacing some of the letters with numbers or symbols. “ExpresstekIsGreat” could become “3xpre55tekI5Gr8”. There are no real words used, making it much more difficult to guess.