I think there are many, may answers to that ..... and they are individual for each of us. Wearing flag pins, displaying the flag, speaking up when the occasion arises instead of just letting things go, attending rallies, writing letters to both local and national news media ...... the list is endless ...... many things are small but significant ....... others (such as the FReep on Saturday) are large and perhaps sacrificial for some.
But we must not forget ..... and must constantly remind others! God bless you!