The group who did GOTV, poll watching, and poll greeting for the Democrats here in my county are planning a post-mortem to do better next time. I think this would be a worthwhile exercise everywhere.
On election day, we had a number of church vans with drivers which we matched with "flushers," whose job was to fill the vans with Democratic voters on each trip out into the community. We had poll watchers inside each polling place trained (largely by me) to know how to watch for and get help in dealing with Republican voters suppression efforts. Outside each polling place in town, we had a table and tent as close as legally possible, manned with folks who were supposed to stay in contact with the people inside as watchers, and with the county folks and me and a couple of other people who were floating from crisis to crisis. We had a few people assigned to link all of these efforts together.
We had current poll list, in which I'd marked voters by some Demographic and with a guestimate who are best likely voters were based on prior primary voting history and some other information. We had people set up to go phone-bank crazy in the afternoon to call folks we thought hadn't voted yet.
The idea was to help make sure people not on the poll list got to vote by affidavit if they should have been on the list, to make sure voters didn't get the run-around, and to keep Republican poll watchers from getting rank.
We had excellent success with supporting our voters, pretty good success dealing with the Republican poll watchers (we had a manager run one group out of a rural polling place where the folks were talking about the candidates using racial epithets-- our poll watcher pointed out that this was campaigning within the polling place, prohibited by statute. Another watcher had a Republican watcher thrown out for intimidating voters. On the other hand, there were several poll workers working very closely with the Republican poll watchers, and refusing to cooperate with us. We have taken names and will deal with them in the future).
Anyhow, the next job is to figure out what worked and what didn't, and how we can come up with a long term strategy of keeping this effort up and improving it.
We've done this in municipal elections (there is a 39% African American ward with a Black alderman in Oxford, thanks to this kind of work) and this was our first effort quite like this in a national county-wide effort-- we've done pieces of it, but needed to do more, and plan to do more still.