I think the first product I remember using as I a pre-teen starting in on my evolving skin care journey was Noxzema. Good ol' Classis Noxzema. As my skin (aka hormones) changed as I grew, I tried various other products for various skin issues: breakouts, oiliness, blackheads, etc. It unfortunately wasn't until college (after the years in high school out on the track field in the sun everyday) that I started wearing SPF every day on my face, which I of course continue regularly today, along with my current collection of anti-aging products.
But all the time the products were about my face. I did use body lotion on my arms and legs, but pretty much I took for granted all the skin from my chin down. But that is a mistake. All of our skin is aging together, and needs attention to keep it at its best. It may not be as common everywhere else, but in LA it's not hard to find a mature woman with a youthfully taught face (courtesy likely some Dr. in the 90210), but then the deep lines and sag in her neck, and the spots on her forearms and back of her hands give her true age away.
The following 3 body parts need our attention as much as our crows feet and smile lines to help them age well:
1. Your Neck