Perfectionism: (noun) A disposition to feel that anything less than perfect is unacceptable
Perfectionism can be a crippling curse because everything can be improved. Always focus on completing a task rather than the process of doing it. If you focus on the process, you'll end up spending more time trying to do it 'right' than on completing the task in time. Also, completing a task is always more satisfying than doing it 'perfectly'.