Act as a senior business ethnographer with 10+ years of experience conducting field studies for Fortune 500 companies. Provide a comprehensive guide on best practices for ethnographic research in [INDUSTRY], focusing on [TARGET AUDIENCE] and [RESEARCH OBJECTIVES]. Include detailed steps for: 1) Planning and designing the study, 2) Building rapport with participants, 3) Conducting immersive observations and interviews, 4) Analyzing qualitative data, and 5) Translating insights into actionable business strategies. Highlight common pitfalls to avoid, such as [COMMON MISTAKE 1] and [COMMON MISTAKE 2], and share tools or frameworks like [TOOL/FRAMEWORK] for effective implementation. Tailor your advice for [COMPANY SIZE] businesses seeking to innovate through customer-centric research.