Aside from redistricting, my other favorite issue around election reform is getting beyond 'pick one' ballots to rankings or ratings voting. It's what elections should be. We can start right away using it at every level to make better decisions. Picking an office outing? Officer of your club? Here are some tools:
Paper ballots. This makes ranked ballots you can print and fill out on paper; also a tabulation sheet for counting with Condorcet’s method. (Instructional video is planned.)
Online votes. I linked to an silly example voting between four flavors of ice cream. But make any poll you like there. Requires fb or google log in to create a poll or vote. Doesn’t spam anyone, just make a link and send the link to people you want to vote.