I always have at least two different passwords - one for low-security situations, like logging into forums or chatrooms, and another for situations where I really want to protect the security of the password and my information, like online banking, etc. I change them every few months.
Personally, I think passwords are fun to create! I love to challenge myself to come up with something different from what others might do, because if someone knows you well and knows your families names or birthdays, it's supposedly easier to break a password based on those facts. I typically use letters mixed with numbers, but I haven't really done much with upper/lower case. Usually, I try to match the password to the topic of the website or program, but sometimes it's just a string of characters that make some sense to me that I can remember. I have lots of passwords
Roz
How websites keep passwords safe
Whenever you register for something online, you are reminded of the importance of a "Strong" Password. It's good advice. But just as users are expected not to use "Password" As their password, the software and sites we use are expected to be careful with the password once we hand it over. How do we know our password is safe once it leaves our fingertips? Well, we don't for certain. But there are some things that help. Ref. Source 6