(First draft was written in response to a John Scalzi post.)
Mostly, we need courage and fortitude. I think most commentators here underestimate how bad it can get, and how fast. Hyperinflation, mass unemployment, hunger, disease, these were all things good government shielded us from for 60 years. A Trump administration might bring any or all of them back.
We can fight domestic disasters, but if, for instance, the fascist faction of the Trump administration succeeds in breaking up the European Union (http://talkingpointsmemo.com/edblog/trump-has-a-plan-to-break-up-the-eu), or they default on the national debt or adopt other disastrous economic policies (http://adviceunasked.blogspot.com/2016/12/econodisaster-ahoy.html), or the extensive cuts in government spending and employment (http://thehill.com/policy/finance/314991-trump-team-prepares-dramatic-cuts) that Trump promises lead to an economic collapse, there is little we can do.
As far as health care, I am now a supporter of states rights. (https://www.balloon-juice.com/2017/01/18/1332-juiced-up/) For you people in red states my thoughts and prayers are with you, because that is all I have to offer you.