There are several mistakes you can make in the estate planning process—the worst of which is not having an estate plan at all, which can leave your loved ones with a long, stressful, complex probate process after your death. Another detrimental mistake is making an estate plan without the help of a lawyer. While you may think this may save money, it may actually cost more money in the long run since, without a lawyer, your plan could not be legally bound. An attorney can ensure that your assets go exactly where you want them.