The official advice with passwords is to change them every three months. A lot of people ignore this or are not aware they should be changed that frequently. How often do you change your passwords?
I try to change my passwords fairly frequently but just realised the other day that at least one of my passwords is now over twelve months old.... but I can't think of another one to replace it with, so I still haven't changed it! It's on my To Do list....
How about your children/grand-children or parents names, with a house No thrown in there as well. Just a thought! You've probably already done it by now anyway, VerityG!