I would also include my car's license info. I have this fear that if one of my vehicles ever gets stolen, I won't be able to tell the police what the tag number is. Along the same lines, I might include the phone numbers of my credit and debit card companies. Alas, that won't do you much good if it's kept in with the wallet with the cards that just got stolen.

I might also consider the phone number of a preferred wrecker company or AAA and even a taxi company -- though usually a call to 411 can provide that.