What factors can motivate a person to work harder?

Motivate to work?  How do you motivate a team?  How do you motivate a person?  How do you motivate employees?  What motivate aperson to work?  What the motivate to work hard?  How do disabled person motivate?  Why employees resgin their jobs?  What motivate you to work harder?  What makes you want to work hard?  What motivate you as sale person?  What factors motivate you to work?  How do you motivate people to work?  What factors motivate you on the job?  How did you motivate your group in work?  What are some factors that motivate them?  What factors motivate members of congress?  How do you motivate people who don't work?  How do you you motivate a person with adhd?  The work can become repetitive - how can you motivate yourself?