Essentially you need to make it possible for people to refinance, both by getting rid of prepayment penalties and strongly "encouraging" lenders who gave out a bunch of mortages they shouldn't have to renegotiate the terms in order to make repayment more realistic.
Maybe if they'd listened to me we wouldn't have had all those problems all those years.
Joking aside, my real reason for looking that up is that blog time gets very confusing and sometimes I forget how far back it was obvious that the housing situation was going to be a disaster. Quite awhile.