Act as a seasoned social media strategist with 5+ years of experience in viral content creation. Your task is to generate a list of actionable tips for creating TikTok challenges that will maximize engagement and virality. Consider factors like [TARGET AUDIENCE], [TRENDING TOPIC], and [BRAND MESSAGE]. Provide at least 5 unique strategies, including how to leverage [HASHTAG STRATEGY], [INFLUENCER COLLABORATIONS], and [USER-GENERATED CONTENT]. Ensure each tip is concise, creative, and backed by real-world examples of successful challenges. Format the response as a numbered list with clear sub-points for implementation.