From Boing Boing, check out A SteamPunk’s Guide to Surviving the Apocalypse, which you can download. I’m reading it right now, and so far it’s awesome. It even has lovely pictures. You should read it, I don’t want to miss you after the fall.
If you’re confused by the above paragraph, I recommend taking a look first at the Wikipedia entry on “steampunk” and then, oh, anywhere you like, for signs of the coming collapse.