It's good to take a break once in a while.
Steve has a big essay due for school the next day and after several hours working on it he is beginning to get very tired.
Steve wants to get a good grade on the paper.
Steve takes a break to go for a walk and refocus his mind before returning to finish his paper.
Steve keeps working despite feeling tired and finishes writing the paper just before midnight.
Steve gets an A- on his essay and is very happy with the grade.
Steve get a C- on his essay and is pretty disappointed.