Curiosity and interest will take a major part in enthusiasm. Interest to know the subject and curiosity to know the next happening are essential for a work to be completed successfully. Worker having both of them will show enthusiasm to make the work more fruitful.
A lot of other things make an employee or worker enthusiastic. A comfortable office atmosphere, offer of incentives and a pat of appreciation will generate enthusiasm in the employee. Innovative ideas, research and development oriented discussions among staff will be beneficial to an organisation.
Not only in occupation but also in personal life of an individual, enthusiasm will help to make everyone happy. Everyone cannot show enthusiasm because it is the talent of an individual.