Find your polling location. Go vote!
Your ballot will be deciding much more than just the president. Even if you did theoretically think both presidential canidates were equal in all regards (they aren’t), then vote for the down ballot races!
Keep your local school boards from having insane people on it that will ban books and harm your kids or your neighbors’s.
Vote for the constitutional ammendment questions and ballot initiatives. For instance, many states have either pro and anti abortion questions on their ballot.
After you vote, you can also volunteer to phone bank for last minute get out the vote calls!
https://go.kamalaharris.com/calls/