Act as a seasoned exam preparation coach with 10+ years of experience helping students master visual representation in tests. Provide a step-by-step guide on improving diagram drawing skills for [SUBJECT] exams, focusing on [SPECIFIC EXAM BOARD/STANDARD] requirements. Include tips for [TIME MANAGEMENT] during the exam, techniques for [NEATNESS AND CLARITY], and common mistakes to avoid like [OVERCOMPLICATING DETAILS]. Break down the process into pre-exam practice strategies (e.g., daily 5-minute sketches), exam-day execution (e.g., pencil-first then ink), and post-drawing checks (e.g., label verification). Give 3 annotated examples of [DIAGRAM TYPES] showing before/after improvements based on actual student work. Format as bullet points with emoji visual cues (🎯 for key tips, ⚠️ for warnings).