It is important that the password you select not be easily guessed or discovered by trial and error. The most secure type of password consists of a random sequence of upper and lower case letters and digits, but because this type of password is hard to remember and usually difficult to type we don't recommend that you take security to these lengths. Good Ideas for Password A password consisting of two randomly selected lower case words separated by a punctuation mark is usually secure enough.
Numbers are also very useful and appropriate.
Your primary consideration when choosing a password should be that it be easy to type, since you may be typing it often. Do not use words you can find in the dictionary Do not use names of people, places, or things. Your password should not be trivial, predictable or obvious. Your password should not be the name of a person, pet, city, street, day of the week, or month of the year. Your password should not be a word that could be found in a dictionary.