Save every last tax dollar
Taxation, in its multiple forms causes huge erosion of your income, your net worth and your estate. Further, law suits, or family members challenging a will can not only disrupt your plans but they can also cost a lot of money. My rule is that as little as possible should be directed by a will for two reasons. First because it is a public document and can be challenged in court, and secondly you will not be here to defend what you want to see happen with your estate.
It is also important that your investments have clear beneficiary designations. These cannot be challenged, and they are confidential.
