I started a thread on this very subject a couple of years ago - in fact it was the first thread I ever started, and almost my first post on Mudcat.

BS: 5 Objects to take if house on fire?

Looking at the list I posted then, it would still be pretty much the same, except that I forgot to put things like car keys, wallet, money and cards on the list - but I always keep these things in a shoulder bag that goes everywhere with me anyway - so that one goes without saying.

I still haven't managed to train my cat to carry things though.