If you pass away, the beginning of your estate plan is your will. It helps to divide your assets among your heirs. For many, that is too basic to suit all of their needs; they also consider more complex estate planning options like trusts and powers of attorney. It's important to carefully think about all of your needs and determine what you can do, beyond a will, to address them.
That said, it's clear that the will is the first step. It's the cornerstone of the whole thing. It's where estate planning begins. Does that mean that most people have a will? Shockingly, it does not.