Protecting the ones you love and making sure that your end of life wishes remain clearly stated are important parts of creating a will. If you've already taken the step of making a will, then you are well ahead of many Americans who continue to put it off. Some of them will wait too long and never get around to crafting a will, leaving a mess for their survivors to sort through while they simultaneously cope with the loss of their loved one. Fortunately, if you already have a will, then you don't have to worry about that nearly as much.
However, a will is only as useful as it is accurate. If you change your mind later on about something that you put into the will, then you should certainly take the time to amend it and make sure that your wishes remain clear.