To "under promise and over deliver" (UPOD) means to produce value for others so they experience delight. Often used to describe ideal customer service, the doctrine is perfect for ideal employees as well. To practice this doctrine, focus on quality, not necessarily quantity. If your boss asks for a 10-page report and you submit 11 pages, you may have underperformed. But if you deliver the 10-page report early and it relieves your boss's stress, you're over delivered. See the difference? To master UPOD, empathize with the receiver. This makes UPOD an art - you must consider what would create delight for the customer. UPOD is a trait of outstanding employees. Adopting the practice will breathe new meaning and excitement into your job, and good things will probably follow.