If you think you may forget some of those passwords, Password Memory is the application for Windows you need. It will keep all of them and you'll be able to access them at any time to check and use them.
Don't worry about safety, all that data you enter in Password Memory will be encrypted and only people with the password will be able to access it. Remember not to forget that password!
Finally, Password Memory can be installed in a USB drive, so you can use your passwords on any computer.
14-day trial version.