Decide whether you mean a last will and testament or a personal testament
Identify yourself clearly with your full legal name and address
State that the document is your testament and that it revokes prior versions
Name the beneficiaries who will receive your assets or wishes
Specify what each beneficiary will receive
Name an executor or trusted person to carry out your instructions
Name guardians for minor children if applicable
Include alternate beneficiaries or backup choices
Sign and date the document
Follow the legal witnessing or notarization rules in your jurisdiction
Store the signed document in a safe place
Give copies or tell trusted people where it is kept
Review and update it after major life changes