Readers at the Freakonomics blog recently interviewed security expert Bruce Schneier, touching on issues like phishing, encryption, and online storage, to name a few. On the topic of passwords, Schneier said there are too many for anyone to remember, so he relies on a fairly low-tech solution:I write my passwords down. There's this rampant myth that you shouldn't write your passwords down. My advice is exactly the opposite. We already know how to secure small bits of paper. Write your passwords down on a small bit of paper, and put it with all of your other valuable small bits of paper: in your wallet.Schneier's
Windows/Linux: Command-line utility PWGen generates random, meaningless passwords but uses letter and number combinations that can be pronounced and memorized. Simply typing "pwgen" and hitting Enter will shoot back a screen full of passwords to choose from, helping to prevent shoulder-surfing sneaks, but you can easily hone down and customize the results with a few command-line switches. Those seeking to store and generate more random passwords should check out suites like The Firefox Asterisk Revealer bookmarklet reveals the contents of any password field (i.e., a field whose text is obscured by asterisks) in an alert box using a simple bit of javascript—particularly handy for those sites for which you've saved the password but long since forgotten what it is. The post itself just includes the javascript, but you can turn it into a bookmarklet by simply right-clicking your Bookmarks toolbar and selecting New Bookmark, and then pasting the javascript into the Location field.

Linux only: Free security application MyPasswordSafe offers a single space to store usernames and passwords for all your desktop and web applications. All your password info is locked away with the Blowfish algorithm devised by security expert
Mac OS X Leopard only: If you tried installing our favorite password manager for Mac,
Firefox only: Create strong passwords with Password Hasher, a Firefox extension that automatically generates unique passwords based on the destination. Unlike previously mentioned PwdHash, Password Hasher has integrated functionality (the "Bump" button) that assigns version numbers to passwords. It also consolidates passwords for domains, which is particularly useful if you use the same login across several subdomains on the same main site. Finally, save portable versions of the HTML so that you can generate your hash words on any machine without requiring the Password Hasher extension itself. Password Hasher is a free download, works wherever Firefox does.
Password Hasher [Firefox Add-ons]