A conscientious individual is organized, industrious and reliable. When given a task, this person will work hard at it, giving her best effort, until it is completed. She can stay focused whether studying for a class, cleaning the house or helping to plan for a major event.
This is the type of person that does well on projects working with others. Looking ahead to the successful completion is reward enough. This includes neatness at home and setting personal goals such as maintaining a healthy diet and an exercise routine.
While such a character might make for a boring story, imagine what happens when her work practices are disrupted by a disorganized, uncaring, unreliable team member. Conflict will surely arise.
Your task is to write the story. Setting, narrative and dialogue are all necessary in order to establish the protagonist’s normal world. Tension builds when something or someone throws that world off kilter.
Have fun with this one.