Here are some tips I gave users who struggled with generating and remembering passwords.
1) Use phrases to help you remeber you passwords, and use either the first letter, last letter, both, etc., of each word as your password.
2) Replace certain letters from above with numbers and special characters. i.e. replace O with zero, I with one, E with 3, S with $, A with @, etc.
You can even write the phrase down on a post-it and leave it around your computer since only you know what it is used for and which letters of the phrase make up the password. This will also allow you to change the phrases/passwords more frequently since you don't have to worry about forgeting them as you can write them down or store them on your computer.