How many unique passwords do you have and how do you keep track of all of them?
Five or six, but they’re all variations on the same word-number-symbol combination so I can remember them fairly easily.
A good friend has my PayPal password (which I change periodically) in case I die or something. I get small quarterly payments deposited into PayPal and someone might as well get the money if I kick the bucket.
Over 30, last time I counted.
About half of them are personal, and don’t change. Most are variations on a central theme that’s very unique to our family.
The rest are work-related, and I have a tracking system that helps me keep maintain, and allows me to re-create past passwords (if I forget to change one during the normal update cycle… I have to change all of them every few months).
The short version. I have a road atlas on my desk. We take annual vacations involving long, multi-state road trips every year. I know the route of every vacation we’ve taken for the last 20 years. Each unique password is assigned a year, and its cycle follows the route we took on vacation that year. When the update cycle arrives, I select the next town in that computer’s “route”, do a sort of mental “hash” on the name (switching characters around according to a pattern) and add either my standard prefix or suffix depending on the requirements for that particular password (special chars, numbers, caps, etc.) and have my new password. There are enough towns that I always have enough to get past the re-use rules (thou shalt not re-use a password for x number of years, etc.).
Nothing’s written down, I can easily remember, or create a new one, and I can go any distance into the past to remember what the password was for the #03 lab door from last year ('cause I haven’t been there 14 months but I know it’s based on the vacation we took in 2003).
OK. I guess that wasn’t the short version…
25+
Some work related, but personally I used 1Password and generate a unique password to each site that requires one. And they’re usually 16-20 characters long.
25+. I have a system that is easy for me to remember but produces unique passwords that look like gibberish to the casual observer.
For stuff that really needs to be secure, I use the password utility KeePass. But I find it a bit of a pain to use for everything.
Reusing passwords, especially on sensitive accounts is a very bad idea as I’m sure most people know - hence the question. I believe that for all but truly insignificant signons, one should use a different userid and password for every site. Different ids allow you to keep different parts of your online existence segregated. Different passwords make all of your accounts not only unhackable but the loss of one won’t compromise anything else.
This may sound extreme, but given all of the browser plugins and 3rd party apps that will both track new ids and pws, and sync them between computers, I don’t thing anyone has a good excuse for doing other wise.
For example, I use the free firefox plugin, LastPass. This also integrates with Xmarks if you happen to use that. Once you pick a username, lastpass will generate a password for you, remember it, sync it, and, if you want, automatically log you in when you go to that site. I have accts where I have never typed a password - ever. I let lastpass pick one (based on my parameters), fill it in, log it and log me in every time I go to those sites. It just doesn’t get any safer or any easier.
I counted 11. I must have more that I never or hardly ever use and have long since forgotten.
I have about 20, but they are variations on 4 or 5 different base passwords. I keep them in a password-protected spreadsheet.
None of your business. 
I use PasswordSafe and currently have 72 entries. Some are for sites I no longer use, and some for internal systems that no longer exist, but I guess there’s still about 50 that get occasional use.
3 or 4 dozen I’d guess. Lastpass.
about 5 or 6
25+ (actually, 50+ - not all “personal”, but most are my logins for client computers I have remote access to)
I use KeePassX to store passwords.