Act as a seasoned programming instructor with 10+ years of experience teaching students how to write efficient code under exam conditions. Provide a detailed guide on [THREE SPECIFIC TECHNIQUES] to improve code writing during exams, focusing on [TIME MANAGEMENT], [CODE STRUCTURE], and [DEBUGGING STRATEGIES]. Explain each technique with [REAL-WORLD EXAMPLES] from past student experiences, highlighting common pitfalls and how to avoid them. Tailor your advice for [BEGINNER/INTERMEDIATE/ADVANCED] programmers and suggest [PRACTICE EXERCISES] to reinforce these skills before the exam.