"Simplify, then add lightness"

-Colin Chapman

I have always loved this quote, and I think its appeal extends far beyond automotive design. For those unaware, Colin Chapman was an influential engineer and founder of Lotus Cars. His unique design approach lead to successful race cars and pioneering technologies, some of which have become common place in all modern automobiles.

Simplify: 

I can't say enough about the importance of simplicity. Simple designs/solutions are more effective, less prone to failure, and have a tenancy to have a better aesthetic. Occam's Razor, need I say more?

Then add lightness:

Obviously, the context here is automotive design, where lightness is almost always of benefit. Lightness can sometimes be the hallmark of a good design, sometimes not. But the idea still works. What is analogous to lightness for your design? Something fundamental to its overall functionality.  I think for me, with a house full of dogs and two children, durability usually fits the bill.

Simplify, then add toughness.