Forbes discusses 10 common estate planning myths, all of which I have heard. The most egregious myths are that without a will the state will inherit one’s estate and that having a will allows one to avoid probate. Of course, neither is true which is why they are myths.
Personally, the myth I am most vested in is that people need an attorney to draft a will. For reasons stated previously on this page, the cost of retaining an attorney far outweighs the downside of an error or not addressing an issue. Just ask the illegitimate child who inadvertently inherited a share of an estate or the children from the first marriage who were disinherited entirely in favor of the second, late in life spouse.