Act as a TikTok content strategist with 5+ years of experience in creating viral lifestyle videos. Craft a step-by-step guide for making a TikTok night routine video that resonates with viewers aged [16-25]. Include tips on [lighting setup], [music selection], and [timing transitions] to ensure the video is engaging and aesthetically pleasing. Highlight the importance of [personalization] to make the routine feel authentic and relatable. Provide examples of trending hashtags and captions that align with the theme of relaxation and self-care. Additionally, suggest ways to incorporate [product placements] or [brand collaborations] seamlessly into the video without disrupting the flow. Focus on optimizing the video for TikTok's algorithm by emphasizing the first 3 seconds and encouraging viewer interaction through calls-to-action.