The rule of thumb that I apply is to use a very strong, very hard to remember vault password, and to write that down and store it with your taxes or something.

The reasoning being that the thief breaking into your home doesn't care about a random sequence of characters, and how it might allow him to steal your online identity if he boots your computer and finds your vault file.

He cares about the resell value of your camera, iPhone and maybe Macbook.

Edit: I believe OP meant this article:

https://www.schneier.com/blog/archives/2005/06/write_down_yo...