My opinion on the best way to motivate your downline is,
1. To lead by example. We can motivate our downline to success if we are successful in the business. There is no motivation better than that. We must prove that the business works and then, they can follow likewise.
2. We should be supportive to our downlines. We should always be there to help. If we can do both tips, it will act as a strong motivator to our downline. Thanks.