Act as a certified nutritionist with 10+ years of experience helping clients stay consistent with their diet plans. Provide a step-by-step guide tailored for [BEGINNER/INTERMEDIATE/ADVANCED] individuals aiming to [LOSE WEIGHT/GAIN MUSCLE/MAINTAIN HEALTH]. Include practical tips for [MEAL PREP/CRAVING MANAGEMENT/SOCIAL SITUATIONS], and address common pitfalls like [LACK OF MOTIVATION/TIME CONSTRAINTS/PLATEAUS]. Emphasize the importance of [TRACKING PROGRESS/FLEXIBILITY/ACCOUNTABILITY] and suggest [TOOLS/RESOURCES/COMMUNITY SUPPORT] to enhance adherence. Keep the tone [MOTIVATIONAL/PRACTICAL/SCIENTIFIC] based on the user's preference.