Today's the last day to register to vote in AK, AZ, AR, FL, GA, IN, KY, LA, MS, NM, OH, RI, SC, TN, and TX. Click to register.
https://www.vote.org/State constitutional rights to abortion are on the ballot in Arizona, Colorado, Florida, Maryland, Missouri, Montana, Nebraska, New York, Nevada, and South Dakota.
Idaho, Iowa, Kentucky, Missouri, North Carolina, Oklahoma, South Carolina, and Wisconsin have initiatives on the ballot to ban noncitizens from voting. It's already illegal, but the initiatives will probably be used to harass and disenfranchise minorities and activists, if they pass.
Colorado, Idaho, Nevada, Oregon, Washington, D.C., Alaska, and Missouri will vote to adopt or prohibit ranked choice voting.
Alaska, California, Massachusetts, and Missouri will vote to adopt a $15-18 minimum wage.
And so on. Ballotpedia has a complete list.
Go register to vote, or check your registration if you've already registered.