Staying home and trying to make sure others stay home is the best thing we can do I think. Besides the other guidelines ("wash your hands well", "stand 6 feet away from other people") that the government here has put out, I'd try to stay home as much as possible.
Check on friends and family members too, especially those who are in high risk groups, such as older people and those with respiratory illnesses. Check local news sites to see how your area is handling it and what restrictions are being put in place to protect people. If you know any health care workers, try and thank them for all they're doing . They may be overstressed and overwhelmed being at the frontline of this pandemic. Also if everything starts to seem like its too much, take a break from the news for a bit and work on relaxing. Stress has a negative effect on the immune system after all.