Assuming there will be elections after this year (who really knows?), we all should do whatever it takes to be Precinct Workers and members of different election-related boards in our various counties and states. In our state we had Counting And Receiving Board, Facsimile Board, Data Processing Review Board (VERY important; they calibrate machines) — whatever is available.
It’ll be hard ‘cause some of those people hold on to their “positions” like grim death, but it’s worth a try. If we can stack the boards and precincts with honest people then there should be less fraud.