Order.
There's always someone they'll hurt if you don't stay in line. You've got family. A husband. Pets. Friends. Muggles in your favourite pub or cafe or wherever else you go. That's the first thing to remember.
Second thing to remember is you're already fighting back. Ultimately what the Order does will have an effect, and you can't keep fighting if you're in Mungos or Azkaban or dead. You've already got a good poker face. Use it.