An interesting thread from another forum. Guess writing them in my special book is not the most advised way.
http://howsecureismypassword.net/
http://www.filehippo.com/download_keepass/
From posters;
you can buy laptops that scan your fingerprints which you can use instead of passwords. The software is called Password Bank.
Buy a PROPER password manager program (eg eWallet), but keep a backup somewhere just in case. Backup could be electronic (eg in your hotmail a/c), or hard copy. For an electronic backup, you could write it in your own code (attuned to how your synapses are wired), similarly for a hard copy kept somewhere easy to remember but hard to find.