It is never too early to create an estate plan. These documents need to include durable powers of attorney along with healthcare directives. You also need to make sure you update your will regularly as your life changes.
Once you have an estate plan ready to go, you need to make sure you keep it in the right place so it is readily accessible. These documents will not do much if no one can find them, and the best course of action is to have multiple copies kept at several locations.