>>81534134>avoid the sun and use spf50 hydrating face cream every dayThis is a major one. Was acquainted with my friend's now wife in her mid 30s who used sun cream every day religiously, and you wouldn't have put her above 25 in any circumstance.
Hell, I've seen guys in their mid 40s that took care of their skin and you wouldn't put them above their early 30s. Daily spf moisturizer combined with no smoking/drinking is the key if you can't avoid stress.