My skin has been looking dull lately, so I'd like to hear some skincare tips.

This afternoon, I looked in the bathroom mirror at work and the lighting was so harsh that my face looked really pale. I hadn't noticed before, but my dark circles seemed to have gotten worse and my skin texture wasn't what it used to be, which surprised me. I thought it might be my condition, but now I think it's time for some more systematic skin care. Do you have any tips for skin care that you can share? Daily face masks are great, but I feel like I need some more fundamental improvements, and I'm deeply concerned. My makeup keeps flaking and looking dull, so I've been wanting to come up with my own skin care tips. I'm trying to drink plenty of water and get plenty of sleep, but I haven't seen any noticeable changes, which is frustrating. Does anyone know any skin care tips that I can incorporate into my daily routine? Even if it's just a small habit, please leave a comment and I'd be grateful.