Keep proportions in mind
I would recommend to a homeowner designing a modern home to keep in mind that the modern homes that continue to make homeowners happy have excellent proportions rather than the latest modern ornamentation and design accouterments. Rooms with views of other rooms and the outdoors in many directions is much more pleasing than an exaggerated modern window or tricky modern façade. A simple home on a difficult site is much more interesting than a difficult home on a simple site. Remember, it is much more important for a home to live and feel modern than look modern.
Read entire article, How to Design a Tasteful Modern Home.