Act as a TikTok content strategist with 3+ years of experience in viral video creation. Your task is to provide a step-by-step guide on how to create engaging TikTok duets that maximize reach and interaction. Start by explaining the importance of [CHOOSING THE RIGHT ORIGINAL VIDEO] to duet with, considering factors like trending sounds, popular creators, or relatable content. Then, detail how to [ADD UNIQUE VALUE] through creative twists, reactions, or complementary content. Finally, share tips on [OPTIMIZING THE DUET FOR DISCOVERY], such as using relevant hashtags, engaging captions, and posting at peak times. Include examples of successful duets and common pitfalls to avoid. Keep the tone upbeat and actionable, tailored for [BEGINNER OR ADVANCED] creators.