Traditional GOTV apps and phone / door-knocking procedures certainly worked well for the Obama campaign, but that was in a different era where people weren't saturated by pushy telemarketers and the like. I briefly tried volunteering in the last election and stopped because I disliked the pushy scripts that we would work off of to do targetted get-out-the-vote.

Seeing this article about Reach and its effectiveness was really refreshing; talking to random people on the street and organically generating interest was exactly the kind of volunteering I wanted to do.