How many passwords do you have? With dozens of customers, past and present, plus an endless amount of website logins and registrations, where to keep all of those pesky passwords?
Previously I used a Microsoft Wordfile, which was password protected and encrypted. That worked to a point, but it soon became just a long list of of barely formatted text. I tried Excel, it also offers password protection and encryption, but it too became a sea of tabs and grids of text.
Now I use KeePass Password Safe, open source (means free for all) and regularly updated; as in yesterday. I tried a couple of other password managers, like Password Safe and PassReminder, both weren't bad, but I preferred the KeePass interface. It has ample fields, a easy to navigate UI and you can click on a username or password which it will place it on your clipboard for pasting for only 10 seconds before it is removed.
It is available for Linux, Mac, BlackBerry, Palm, Symbian, PocketPC, etc. Give it a try.