Passphrases are the strongest type of passwords and the easiest to remember. Simply use an entire sentence for your password, such as "What time is coffee?" By using spaces and punctuation, you create a long password that is hard to guess but easy to remember.
Keep in mind that digital data is not the only thing that needs to be protected. Paper documents also need to be protected. When disposing of any confidential documents, make sure they are shredded first or disposed of in bins for shredding. Also, be sure to lock up any sensitive documents before you go home at the end of the day.