Ah, the joy of passwords.

Because I tend to forget passwords, I use a nifty little programme called "KeePass" (here is its official website). The programme can store your passwords for everything and anything, so it is finally possible to have different passwords for all the important and security-relevant things, and only keep the one master password in mind. (Better not forget that, though!) The little programme will even generate long and very secure passwords for you.

The only thing that really throws me off track with Keepass sometimes is when I've generated one of the nice and safe passwords, copied it to its new home, saved everything, bumbled on... and then I find that the password hasn't been stored correctly in its new home because there is only space for 12 digits, and they cut off my password without warning! And there I stand then, trying like mad to get into the site, application or whatever. I KNOW that new password, darn it! I just changed it! I KNOW it's the correct one, it's stored in Keepass!
... and after a while, it dawns on me...

So should you need a little programme to keep track of your passwords (and I think it even can be add-on-ed into Firefox), KeePass is a good choice. It's free, secure, helpful with password generation, it's even portable so you can take it with you on your USB stick or whatever else you carry around for data transport. Just make sure you don't fall into my trap and check the maximum allowed number of password digits first!