Our local hardware store is only allowing a certain number of people in the store at a time. Many grocery stores are also doing this.
My local Whole Foods is doing this. You can only go in when someone comes out. Until then, you are outside in line, standing far apart.
The Mayor of Boston has called for all residents to wear at least cloth masks when out in public - not to protect themselves (cloth masks don't really do a good job of that) but to maybe slow down asymptomatic or pre-symptomatic spread. No numbers on how effective this is expected to be.