Reduce your burn rate (you should have no debt except a mortgage or a lease obligation). Have at least 6-12 months of emergency fund in an FDIC insured account. Network to be prepared to find a new gig fast if yours evaporates. Be prepared for credit card and home equity credit lines recinded with no notice.

I did not do these things prior to the 2008 global financial crisis, and it was unpleasant.