Occam's Razor, also known as the principle of parsimony is a problem-solving and reasoning principle that suggests that the simplest explanation or solution is often the most likely to be correct.
Make everything as simple as possible, but not simpler. Albert Einstein
Entities should not be multiplied beyond necessity. William of Ockham
Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things. Isaac Newton
That's been one of my mantras - focus and simplicity. Simple can be harder than complex: You have to work hard to get your thinking clean to make it simple. But it's worth it in the end because once you get there, you can move mountains. Steve Jobs