[Routine Help] If you could go back in time and change something in your skin care routine, what would it be and why?

Beauty Tips For Body Care
I'm a 22F and curious what preventative measures I can do to avoid wrinkles, hyperpigmentation, etc the long run stuff. I've tried a couple of derm prescribed acne routines (combo prone skin), and I'm scared all those trials might've hurt my skin. I'm currently on differin and taking Retiblan (Vitamin A I believe) and would like some input! Thank you :)
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Submitted by pizzalasagna