Deal with each new outbreak quickly and efficiently. The problem in Italy and China was that the outbreak got out of hand before measures to deal were in place, the big deal here seems to be that if people in critical conditions get support with breathing they often pull through, if they don't they die. If you are dealing with 1000's of cases providing supported ventilation is not possible. If you are dealing with 10's then it can be done.
Practically speaking, I think this means e.g. temperature checks at every school, place of work, subway, train, airport, and large residential building. At entry/exit, like metal detectors. Routine swabs / testing. Ideally could swap, put into an envelope and send off to a central testing facility. What else?
Given the reports of asymptomatic testing, not sure we can confine to small size flare-ups in the absence of this.