I have about 50 passwords I use at work. No exaggeration. I don't use all 50 every day or even every week. So I have them in a file on my computer.
I need 2 passwords to actually get in to my computer but those are easily remembered, one doesn't change and it's the same for everyone in the company, and the other which is specific to my user ID can be continually reset to the exact same thing. Not the most rigourous security...but there you have it.
Then once I am logged in, I have multiple passwords for the multiple development, test and production applications I am responsible for. Plus all the other random things like our HR system, accounts payable system, benefits site blah blah blah.
It's uber annoying and I so wish we had a single sign on!