Final answer:
The most effective step to prevent rental disputes is to abide by the lease agreement.
Step-by-step explanation:
To prevent future rental disputes, the most effective step would be to abide by the lease agreement. The lease agreement is a legal contract between the landlord and tenant that outlines the rights and responsibilities of both parties. By adhering to the terms and conditions of the lease agreement, such as paying rent on time, respecting the property, and following the rules set forth, both the landlord and tenant can establish clear expectations, minimize misunderstandings, and reduce the likelihood of disputes.