The password is the key to everything, but there are problems with a password that drive users crazy. First of all, it has to be remembered, so therefore it either has to be easy or written down both of which is wrong according to the experts.
So do you use the same one for everything, or change it for every site that requires a password? You can see how hard this is getting, but no matter how you store your passwords at the end of the day a password must be secure in order to protect your work, money and identity.
In this info graphic by Killer Infographics they cover the whole concept of passwords, how to create a good one and more importantly which passwords are the worst around, it is better to be safe so choose your passwords wisely.