Offer rewards, not threats - We often go negative to incite others to act, warning to take something away or raising the specter of future problems if they don’t take action. Rewards have the potential to be more effective.
Give them a choice - A sense of control is super important for motivating people to act. Example, team members can be given the opportunity to suggest guidelines for the rule-making process.
Cognitive neuroscientist Tali Sharot suggests that incentives and choices can motivate people more effectively because our brain is set up to be more reactive to rewards and have a sense of action, and that has a huge effect on our beliefs and behaviour.