Strong passwords are usually at least eight characters, include a combination of letters, numbers, & symbols and is easy for you to remember, but difficult for others to guess. The easiest way to create a strong password that you won’t have to write down is to come up with a passphrase. A passphrase is a sentence that you can remember, like “My daughters have two Guinea Pigs called Sunshine and Moonlight.” You can make a pretty strong password by using the first letter of each word of the sentence. For example, mdhtgpcsam. However, you can make this password even stronger by using a combination of upper and lowercase letters, numbers, and special characters that look like letters, to produce; Mdh2GPc$&M.
The safest password technique is to create a new, strong password for every Web site or login that requests one. This is almost as impractical as remembering a long string of random characters. An easier solution is to create a handful of strong passwords and use those at sites you want to keep most secure, such as bank or bill paying websites. Then create another small set of easier to remember passwords that you can use everywhere else.