Act as a senior packaging designer with 10+ years of experience in creating memorable unboxing experiences for e-commerce and retail brands. Provide a detailed guide on best practices for designing packaging that enhances [BRAND IDENTITY], ensures [PRODUCT PROTECTION], and delights [TARGET AUDIENCE]. Cover aspects like material selection, sustainability considerations, visual hierarchy, tactile elements, and interactive unboxing features. Include examples of successful packaging designs from [INDUSTRY] and explain how they align with consumer psychology. Also, address cost-effective solutions for [SMALL BUSINESSES] to compete with larger brands. End with 3 actionable tips to immediately improve an existing packaging design.