My head definitely isn’t in it, and the quality of many of the papers I reviewed was quite bad, but I think that the results here generally back up a few commonsense ideas:
People care more about something when they can easily empathize with or visualize it
People are more likely to trust/listen to you when they see you as attractive, well-groomed, well-dressed, etc.
People like to help “winners”—making someone feel like they can take a bit of credit for something that’s very likely to succeed can be very persuasive
In general, follow up as soon as you can when someone agrees to do something, lest they forget or change their mind