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Of course, another idea is to use something like LockNote (http://lifehacker.com/178167/download-of-the-day-locknote) along with that secret word/number you've agreed on with your significant other. Simply encrypt your "Emergency Kit" info within an executable txt file. Store it on a USB drive and put that in your fire safe, or send the file to your mate via email every time you update it. Even if they aren't tech savvy, all they have to do is double click the file, type in the secret, and voila -- keys to the kingdom! :)
2 years, 2 months ago on The 1Password Emergency Kit
Good stuff! I think this is a challenge for all of us where one side of the relationship is a tech geek, and the other is a luddite. :) One thing you could do is come up with a secret word or number that is part of your master password for 1Password, Dropbox, etc. Of course, this secret word/number would be known to you and your significant other. Then, on the sheet that is stored in your fire-safe, put XXXX (or whatever) where the secret word/number is supposed to go. This wouldn't make it foolproof, but at least it would be considerably harder for someone to gain the keys to the kingdom if your firebox was breached.
Of course, you could change the secret word/number a couple times a year, modify all your master passwords, and then shoot your significant other an email with the new secret.