In the wake of the Dallas shootings (where 5 police officers were killed while policing a rally that was protesting them) I think we have the responsibility to reach out to our local law enforcement and let them know that we support their efforts at protecting our communities. You can find your local precincts' phone number online. A simple phone call will mean so much after the devastating killings of our nation's finest.
Sample script:
"Hi, my name is So and So, and I am a resident in So and So community. In the wake of the tragedies in Dallas, I would like thank you for your continued service and to let you know that I support your efforts at protecting our community."