As far as action goes, the availability and cost of natural gas has bought us some time. I advocate:
1) development of natural gas resources in an environmentally sensible way. The key points are a) inspection and rigorous enforcement of good well head installation and maintenance practices, b) monitoring of shallow groundwater before and during gas development, c) effective management of water resources associated with fracking and proper treatment and disposal of backflow and produced water, and d) minimizing release of natural gas during well operations and pipeline transport.
2) aggressive conversion of coal fired plants to natural gas. Make coal plants have the same greenhouse emissions as gas-fired plants. Gas will come out much more economical under this circumstance.
3) aggressive continued investment in development of economical renewable energy
4) conservation and efficiency
5) international cooperation -- basically getting the rest of the world on board with 1-4.