Absolutely nothing.
There is no need to balance the books now, it would be exactly the wrong thing to do. We're in a crisis and have historically low interest rates.
With the sole exception of the austerity of 2010 and onwards, previous recessions' debt has been ameliorated with borrowing, then taxes, then spending cuts meaning the richest pay more. 2010, there was a decision to use the crisis to try and fundamentally change the country by paying with spending cuts up front, but not raising taxes, thereby pushing costs onto the poorest in society in an effort to reduce the size of the state.
It didn't go well.