During the summer of 1970 in Madison, Wisconsin I helped the grape boycott campaign. I particularly remember one day when I went to the student union of the University of Wisconsin to use the pay phones to call produce buyers at the supermarkets and speak to them about the danger of non-union grapes being eaten by their customers. Usually people stood in line for these phones. A woman came into the area and when she heard my side of the conversations she motioned to me to continue using the phone and lined up at a different phone. I appreciated that support. Also, the produce managers seemed a bit at loss how to respond to my concerns.
Anyway, I know that I only did a little bit when others contributed much more, but I felt empowered by being part of a campaign which actually succeeded.