Where to store them? If you have a PDA/cell that will do good, but if you are like me and dont, You should store them in an encrypted text file in your docs (to encrypt, right click on the file -> properties -> advanced -> check "encrypt file to secure data")

If your going to go on about security, one of the first rules to remember is don't write down your information such as passwords.

I even have several different complex passwords for different things - and I find it easy to remember them all, most probably out of habbit, so theres no reason that people can't remember just one, unless you have short term memory loss :P.

All my passwords are 10 chars or more, mixed case alpha-numeric passwords, passwords for things like my bank account are more.

Don't forget most websites/programs will accept symbols too, such as [*(~ etc.