Forget writting down your passwords on a piece of paper under your wallet.  You can just store them in a free as in Open Source software program vault called Password Safe.  This is definantely a solution I will continue to consult on, but wanted to share how cool it was.  You can neatly store your passwords in a categorical manner so it is easy to retrieve.  You double click your password and it copies it to clipboard without showing the password to should browsers. 

Password Safe allows you to manage your old passwords and to easily and quickly generate, store, organize, retrieve, and use complex new passwords, using password policies that you control. Once stored, your user names and passwords are just a few clicks away.

Using Password Safe you can organize your passwords using your own customizable references—for example, by user ID, category, web site, or location. You can choose to store all your passwords in a single encrypted master password list (an encrypted password database), or use multiple databases to further organize your passwords (work and home, for example). And with its intuitive interface you will be up and running in minutes.

So take a look if you need some immediate security and organization of your passwords.