Motivation

When a person in a project is motivated, more can be achieved.
How do you motivate people?

Pay attention to the subject,
Emphasis the positive things
Explain what it means for the organization (the big picture)
What does it deliver to the company, department, team and to the person
Give metaphors (examples)
What if we do not do this.....negative results, negative spiral... etc
Repeat this in different ways

But most important is 'be enthusiastic and motivated' yourself!