I never was into skin care beyond washing my face and occasionally using herbal astringents on my T-zone when i was in my 20s. I was fortunate to have good skin and no acne, just the occasional zit due to stress or menstrual cycle.
But in the 1990s, i noticed my under eye area was dry and sometimes painful when i rubbed it (i have allergies) and when it was cold out my cheeks were sometimes a bit raw. So for the first time in my life i got a moisturizer. Then when i turned 60 i decided maybe i should take more care of my skin.
First i got drugstore stuff, mostly Olay. I HATED the ATROCIOUS perfumes! Then i discovered sephora - 1 mile from my house! I rocketed up to VIB pretty quickly, mostly because of expensive skin care products. But i know a little about some of the ingredients and began to question what was in those containers and how good they really were.
I discovered http://beautypedia.com - run by Paula Begoun - which reviews skin care products. I think the reviews make a lot of sense, based on what i know of chemistry. Some people complain that she promotes her products, but she rates all levels of stuff and i think the reviews are not prejudiced by brand or price, but based on ingredients, packaging (products in a jar will oxidize - and many ingredients lose their efficacy when they oxidize), and she does mention price, that is, why buy an $80 product when there's a $20 one hat's just as good? Her ratings are Best - Good - Average - Poor.
I pretty much ignore her makeup reviews because i am not into an all-neutral colors, all-matte eye shadow look. As far as makeup goes, I only read her mascara reviews, since i have a history of problems with mascara making my eyes burn.
I have gradually switched over to her products almost exclusively because they eliminate irritating perfume ingredients, have a lot of good skin care ingredients, and are reasonably priced. I'm saving a lot of money, but, well, i'm still a sephora VIB. I now have a skin care regimen i'm not giving up, but the products are reasonable priced, so i'm not cutting back on them.
I highly recommend reading the beautypedia reviews, although i find a few of them to be a bit snarky. I'm not pushing her products, just her reviews. I think they are very helpful for chosing skin care. Also, they can help you understand what all those ingredients are and what they do.