Wear the best mask you have access to; Every time you go out and encounter people; Protect your eyes as well - glasses and a cap at least;
Obtain an N95 mask or two for every person in your household.
If you cannot find one, demand of your local, county, state and federal politicians to help make N95 masks easily available.
Talk to your friends and encourage them to get on board.
However, you are protected by an N95 mask whether those around you wear a mask or not!
Ask businesses you patronize to support and subscribe to the Houston N95 Mask Protocol. They can play a major role in influencing customers and in making masks available.