Most important is your health for glowing skin. I'm 45 and I've never seen any difference from products. I have lots of beauty guru friends. I've used the best, I've used the cheapest, I've used natural. Meh. No difference. Right now I'm using a hand made night cream once in a blue moon that I like fine, and several day creams with spf and no difference in my skin from when I use other things...I find most nifty new products feel good at first, but then you get used to them or something. Soap and washing your face too much can dry out your skin.
However I have seen HUGE IMPROVEMENT (vs huge skin deterioraton when I'm slacking) time and time again from the things that really do work:
#1 SLEEP. My skin sucks when I'm low on sleep.
#2 CIRCULATION. My skin glows and loses ten years when I'm getting my heart rate up daily and sweating. Head stands or other inversions rush blood to your head too and make your facial skin glow.
#3 Drink enough water.
#4 Stay out of the sun. Sun block when you must go out, but I prefer staying indoors under a sun hat in a turtleneck. Always stay in the shade. Always put sunblock in places the sun hits. Which is annoying so stay out of sun.
#5 Raw fruits and vegetables are the skin's instant rejuvnenator. When I do 80% fresh raw food daily, My skin is like a plump, glowing, porcelain doll. When I do carbs and little else: Dull, saggy city. This should actually be #1.
#6 Healthy fats are your skin and your brain's main support. Avocados. Olive Oils. Flax Seeds. Organic raw nuts. Coconut oil. Real butter. Dark chocolate. Actually, this should probably be #1.
During phases where I'm eating right, sleeping right, exercising, and not tanning (I never tan-eek) I pass for much younger than I am and I glow.
When I slack in any of these areas...I look and feel much worse. Wrinkles start looking permanent, dullness, breakouts...
The moisturizers really have no effect. But I LOVE new products for fun so I'm excited to see other recommendations.
I heard that anything marketed as anti-aging is bad for your skin over time. I'm not sure that's true since wealthy people usually use those products and look good older, but that may be from fancier overall lifestyles with less stress...