The circumstances of our lives change constantly. If you already have a will, here are some everyday events that should nudge you to change it: marriage or re-marriage; divorce or the death of a spouse; a new baby, step children or grandchildren; the death of named heirs; the sale of your house, a family business, or any asset that made up a large part of your estate; adjustments in distributions to your heirs to account for lifetime gifts to some of them, or the anticipated need of others for ongoing care after your death; you wish to add or change a charitable beneficiary.