I met a friend and it seems like I'm the only one who's been hit hard by the passage of time. Could you please share some management tips?

Today, I ran into my best friend from high school for the first time in ages. Oh my, she looked exactly the same as she did ten years ago, and I was shocked. Under the cafe lights, I suddenly felt a pang of frustration at how dull and inelastic my skin looked. So, I'm going to start taking better care of my skin. Do you have any special skin care tips that only you know? For now, I'm diligently applying basic products and trying to adjust my daily habits. My skin is particularly flaky, perhaps because of the seasonal change, so any tips on how to maintain moisture would be incredibly helpful. Honestly, it's not easy to just use a face mask every day under the pretext of being busy. Still, I'd like to learn some skin care tips that I can consistently implement before it's too late. What do you consider the most important skin care tips for each person?