The most important way to "participate" is to vote!
I don't know who came up with "The 3 P's of Voting" but they missed the boat when it came to the second "P."
Check out the weblink above and review what is written on their infographic that I think few people will read other than myself and anyone who clicked on this blog post. Be Prepared; Participate; and Be Patient are the three P's.
Having run for election myself, and lost twice, I know the second "P" would best be a "V" and have that stand for Vote! When running for port commissioner, I ran into a slew of people who said, "I don't vote. My vote doesn't count! Why should I vote, it is all corrupt anyway."
Vote, vote, vote! This "participate" sounds like "become a poll watcher" in the era we are in (I know it does not actually say that). If you want to make a difference, vote!