Diversification is the only logical approach to building durable portfolios for the pre-retirement accumulation years as well as the post-retirement distribution phase. The 7Twelve portfolio represents a starting point for every investor. It is the diversified “core” element that represents the first building block in a portfolio. Based on the needs of each individual investor, a variety of different assets can be added around the “core.” This chapter discusses the secret to investing, which are: (1) first secret-successful investing requires patience that is measured in years, not weeks; (2) second secret-successful investing is boring; and (3) third secret-successful investing requires diversification depth and breadth.