Attention to Detail
Why do details matter?
When details are perfected, a user experience can be quite enjoyable. For example, Apple's laptop sleep indicator mimics the rhythm of breathing which is psychologically appealing. Fine dining restaurants replace silverware between each course. Car dealerships wash your car after an oil change. Starbucks baristas remember your name. Attention to detail is everywhere.
Details are like sub units of a total user experience. Perfect each detail and you will win over your audience. Miss just one and a total user experience can be jeopardized.
Its rare to get all details 100% spot on but try anyway. Start by focusing on each detail independently. Perfecting each detail brings more harmony to any user experience.