E.D.
Soap and water, lotion (Aveno is what's on my shelf right now).
From what I understand, a skin perkiness is mostly genetic and environmental. Yes, sun, wind, salt, diet - these things will take a toll. But then, some people just luck out in the gene department.
My dad, for example, drinks like a fish, is in his seventies, and smoked three packs a day for decades. He worked construction from twenty and is still in the sun daily (he lives near the equator). Yah, he has a few wrinkles, but for his skin is beautiful. Dark, soft, clear.
My mum grew up in the southern hemisphere and she's got fair skin. This being in the day where people dowsed themselves in baby oil and sat out to brown. She has the cleanest lifestyle and her skin glows - and also she's got sun spots and complains of wrinkles (my mom is seriously silly about her looks though - she'll be sixty soon and she is an absolute fox, wrinkles or no).
We'll see how my skin ages. I've put my body through some hell and I don't wear sun screen. I can see some age in my face but I like it. I have smile crinkles around my eyes and worry lines in my forehead. Shows my heart better, having these marks of life.