5 Smart Investing Strategies The slideshow presentation that you would like to view is too large for your current screen resolution. Click here to view to view the slideshow at full resolution. Launch Presentation » Share | Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.