Vote everyday in your home, in your relationships, your neighborhood-city-state and country. Think of the water your great grandchildren will drink. Vote/choose on behalf of them: not corporate-greed and economic-ease.
Meet your neighbors. Talk to strangers. Spend time with people outside of your economic/age bracket. Entertain an idea that differs from the little-itty-bitty part of the universe you've grown-up-in and experienced. Embrace complexity. Find principles to live by. Be humble. Listen. If you're privileged and not lobbying/advocating for the underdog; rethink everything.
The Creative Action Network is community sourced activism-art. If you are an artist and/or an activist or someone who empowers artists/movements, you'll enjoy the site.
They get artists to contribute work for causes that need to be amplified. Creative Action Network gives 40% of the sales to the artists, keeps some for overhead and producing the poster/t-shirt/etc, and then donates the majority to the cause. I'm a fan. You should be too.