On: Write your passwords down

[_b8r0]

This is and isn't bad advice. Writing your passwords down and storing them in your wallet isn't necessarily a good idea. You may be able to secure your wallet, but there may be somewhere better to secure it (such as a house safe).

Rather than writing the passwords down, use a decent tool like 1password (http://agilewebsolutions.com/onepassword) or Keepass (http://keepass.info/).

[Legion → _b8r0]

Keepass is brilliant and supported on Linux, Mac, and Windows.

I have one super-strong password that I've memorized that encrypts my KeePass database, and then I use Keepass to generate and store random passwords for me.

[joshkaufman → _b8r0]

This looks like a good way to generate the passwords you put into 1password or another similar password tool. If the tool fails, you can regenerate the passwords if you need to.

[MikeCapone → joshkaufman]

1Password has a random password generator. That's what I use.

[snes → _b8r0]

No one mentioned Lastpass?

It has a multifactor grid authentication, which along with a user defined password, makes it secure enough for me.

When I started using it, I changed most of my passwords to be 100 characters long. But many sites had a maximum 20 characters or equivalent rule.