So what I've learned at this experience of having my purse stolen:
1. Have a separate form of LEGAL ID kept somewhere in your house (like your passport).
2. Have some extra cash, checks and if possible, a spare credit card somewhere in the house so you have access to money for things (having a spare checkbook allows me to still get groceries, pay the insurance claim on my phone, etc when the banks are closed).
3. Keep a spare car key in the house.
4. Dont let your purse out of your sight, even when you think you should be able to trust it. I was at church of all places.
5. Don't keep your Social Security card in your purse or in your car. (mine was in my house, so glad I dont have to mess with THAT.
Re: PSA: Be Prepared