You should start doing estate planning as soon as possible, even if you are young and healthy. Unfortunately, accidents can happen at any time and it is important to have all of your affairs in order. This will not only make sure that your loved ones are cared for, should anything ever happen to you, but it will also allow you to appoint a medical power of attorney in case anything ever happens to you as well. By doing this, you are giving all of the power to someone you know well and trust deeply. You can be detailed and explicit about what you want to happen to you in any case involving an accident or death. For example, how you want to be buried is something that you can put in your estate plan.