Because there are so many ways that your wealth and assets can be passed on to your surviving family members and other heirs, it is easy to ruin even carefully thought-out estate plans. Your last will and testament may not be the final word on how assets are distributed to others, although many people mistakenly believe this is the case. Beneficiary designations on financial products, for instance, can override your will, and many common estate planning pitfalls may cause heartache and infighting among family members. Protect yourself by getting to know the major “land mines” that can potentially blow up your estate plan.