Retinol is generally considered to be an effective ingredient in anti-wrinkle products. I generally use a retinol containing product at night, although others will swear by a different approach. One that I use and like a great deal is Luna Night Oil by Sunday Riley. It's available at Sephora. I also use the day product (Good Genes) in conjunction with a basic moisturizer containing a sunscreen. I've been told that my skin looks clear and fresh and women at my office have been asking what I use.

Having said that, I suspect the biggest things I've done to prevent wrinkles are I don't tan (haven't since I was about 15) and I don't smoke.