The thing about skin aging, if you want to prevent it, you have to start before you see the first signs of it. That means, we have to start using particular products in our early 20's, I know I know, it's not very exciting, but you will thank yourself later.
Start with the eye cream. You should already know, the skin around your eyes is the thinest, and accordingly it shows the signs of aging earliest. I'd suggest using eye cream even if you're under 20, it's not going to do any harm to your young skin, but will prevent fine lines around your eyes for a long time ahead. Estee Lauder Advanced Night Repair Eye & Clinique Smart Custom Repair Eye Treatment are my top choices.
Make your skin extra nourished with serums & repair oils, and give yourself a little face massage when you apply it. It's a good thing to start using these in your early 20's, before you start using anti-aging moisturizers in a few years time. My favorites are Orogold Vitamin C Booster Facial Serum for the morning, and Estee Lauder Advanced Night Repair for the evening. Speaking of, I don't feel the need to use anti-aging moisturizers as long as I'm using serums & oils, but it might be a good idea to use it once a week or so. I love Clinique's Smart SPF15 Custom Repair Moisturizer and use it once in a while when I feel my skin needs the repair.
And my favorite thing, rose water. Rose water decelerates aging, repairs damage caused by harmful oxidants generated in skin under the effect of UV rays, pollution or harsh skin care products. Plus, it's natural and smells amazing!
CLINIQUE SMART SPF15 CUSTOM REPAIR MOISTURIZER
CLINIQUE SMART CUSTOM REPAIR EYE TREATMENT
ESTEE LAUDER ADVANCED NIGHT REPAIR
ESTEE LAUDER ADVANCED NIGHT REPAIR EYE
OROGOLD VITAMIN C BOOSTER FACIAL SERUM
JURLIQUE ROSEWATER BALANCING MIST INTENSE