Outline how you will handle disagreements or misunderstandings. Agree to celebrate each other's achievements and special occasions. Specify if this is a temporary agreement or ongoing. Include a clause that allows for changes to the contract as the friendship evolves.
Not all contracts need a witness. For example, a simple agreement between two parties likely will not need a witness, although it is in your best interest to have one. However, certain contracts will need a witness. For example, a deed or a will both need witnesses.