Golden Rules of Simple, Clean finish

Your design needs to communicate the intent of your content clearly and honestly. If your viewer has the wrong idea of what your content is trying to tell them, your design isn’t honest enough.
No tricks are necessary here – everything about the design of your creation whatever the project, from product down to the colours, should be suggestive of the product being sold or the information being conveyed.
You know you’ve reached perfection of design not when you have nothing more to add, but when you have nothing more to take away