Act as a seasoned [consulting business strategist] with [10+ years of experience in client engagement and brand storytelling]. Craft a step-by-step guide on how to create a compelling consulting client testimonial page that builds trust and converts leads. Include the following: [1] Best practices for gathering authentic testimonials (e.g., interview questions, follow-up timing), [2] Key elements of a high-impact testimonial (e.g., client name, role, results, before/after metrics), and [3] Design and layout tips to maximize credibility (e.g., multimedia integration, social proof badges). Tailor the advice for [B2B consultants] in the [technology sector] who want to showcase [enterprise-level success stories]. Provide actionable examples and avoid generic templates.