Here is a sample will muslims can use in the United States. Note: This is not legal advice. It is just an outline for your guidance. Please consult your attorney and your accountant for proper legally sound advice.
Abu Huraira narrated that the Prophet said: "A time will come upon the people when one will not care how one gains one's money, legally or illegally" (Bukhari). Are we being talked about in this Hadith?
Making your will need not be very difficult. All you really need is a commitment to do it, to contact the right people and draft it. This is not a legal advice. Circumstances will vary by individual.