I'd think the first order of business would be to get tax compliance up. It wasn't very high to begin with, but since the new year tax revenue has collapsed completely.
Ref: http://marginalrevolution.com/marginalrevolution/2015/01/the...
Ref: http://marginalrevolution.com/marginalrevolution/2015/01/the...
[0] http://www.vanityfair.com/business/features/2010/10/greeks-b...
Greece's biggest problems are not high debt payments, they are 25% unemployment, and GDP having dropped 27% from its peak.