Looking back, what lifestyle habits have affected your skin?

Recently, my recurring skin problems have made me reflect on the lifestyle habits I've been inadvertently adopting that have affected my skin. I've heard that seemingly trivial factors like sleep duration, water intake, and eating habits can also impact skin, which has made me even more concerned. I'm particularly curious to know if late-night snacks or irregular daily routines have been among the habits that have affected my skin. It's been said that behaviors I normally consider fine can actually affect my skin barrier and tone, so I'm also wondering which lifestyle habits I should change first. Could you please share some lifestyle habits that I should definitely consider for skin improvement, starting with practical, actionable changes?