List your assets on scratch paper. Start with real estate holdings, move to bank and investment accounts, vehicles, other investments. List small property items generally as "personal property"; note separately personal property of special monetary or sentimental value.
List your heirs. Include family, friends and even associations. Select a guardian for any minor children or pets, since they cannot hold money directly. Choose a person to handle your estate during probate, gathering assets and distributing them among your heirs; designate this person your executor on your rough draft.
Educate yourself about the basic will requirements in your state. Visit the probate court or the law library to obtain copies of relevant probate statutes. Alternatively, conduct an Internet search. Generally states do not mandate precise or formal will language; most requirements pertain to validating the signature with attesting witnesses.
Obtain a statutory form will if your state statutes include one. Alternatively, get a form will from an attorney's office, the Internet or the probate court. Fill in your identifying information (name, address, etc.), then add assets and heirs. Mention the name and address of any guardians and specify your choice for executor.
Type out your own will in the absence of a will form. Specify in the first paragraph that you are of legal age and sound mind, together with any other information your state requires. Provide the same information about identification, heirs, assets, guardians and executor. State that this will supersedes all previous wills.
Acknowledge, sign and date the will before witnesses in the manner required by your state statutes. Most states require two disinterested witnesses of legal age and sound mind. "Disinterested" means that the witnesses are not among the heirs under your will. The witnesses sign the will below your signature.