Principles of Preserving Wealth 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 4 Elements of an Estate Strategy Learn about the importance of having an estate strategy in this helpful and informative video. Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.