Here's a tip. Use LastPass. It's FREE, it's great to use and wonderful to have. Once you start using Lastpass, you will just need to remember one password ever to open up your jewelry box of passwords!
I personally use Lastpass to remember more than hundred passwords that I use with my online activity . This software can generate random passwords for new websites and save those with Lastpass. I have option to auto-fill, auto-login, auto-authenticate or manually authenticate.
You can setup one-way authentication system for all your favorite signup links like Facebook, Youtube, GMail, Yahoo and much more. Or choose to have a two-way authentication system using a unique and individual grid authentication image that you can keep with your mobile (or online storage) if you think you cannot trust the computer you are using at the moment.
It's available on Linux, Windows, Mac and mobile, you can install it with your Firefox, Chrome, Opera, See more: https://lastpass.com/misc_download.php
LastPass puts all of your individual passwords behind one master password. When you type in that master password, LastPass can then automatically log you in to any web site you visit with saved login credentials. Even better, LastPass syncs passwords over the Internet, so all your saved passwords on your work computer, for example, will always be synced up on your home computer.
Video Tutorials: https://lastpass.com...screencasts.php
Of course, the premium version offers more features.