Excess government involvment in the economy tends to do more harm than good. Take a look at business cycles from the 1960's and 1970's, the height of fiscal policy. They're a roller coaster ride compared to post-1985 business cycles (including the current one). The government should cut taxes, lower spending, lower tariffs, and otherwise, stay the hell out.
There's absolutely nothing that could prevent a recession right now. The World Trade Center was destroyed. That's $100 billion in property. After an economic cycle like that, there's bound to be a recession. However, excess government interference will only prolong the recession, not end it.