Effective methodologies for user testing in tech products include usability testing, A/B testing, and focus groups. Usability testing involves observing users as they interact with a product to identify navigation issues and gather feedback on the user experience. A/B testing allows developers to compare two versions of a product to determine which performs better based on specific metrics. Focus groups can garner qualitative insights from diverse user perspectives, providing valuable context. By employing these methodologies, companies can refine their products, enhancing user satisfaction and overall performance before launch.