What do people with clear-looking skin do differently?

You know how there are people around who have clear skin even without wearing much makeup?

Even though I don't have many blemishes, my face doesn't look clear and feels a bit dark. I'm not sure if it's an issue with my skin tone, hydration, or texture. Lately, I feel like improving my overall skin condition is more important than using whitening products.

If anyone has tips for managing skin to make it look clear, please share them.