Besides cleansing, the two most important skincare habits are:
(1) sunscreen daily - even if you are not in the sun - if you're near a window UVA comes through and is responsible for a lot of skin aging issues and skin cancer;
(2) products with no fragrance/parfum - this is true of natural fragrant plant oils, too - makes them smell good, but is a skin irritant - a lot of skin issues are cumulative, so you may not see problems now, but in the not too distant future...;
Also:
(3) using products in opaque bottles and tubes, not jars - many skin care ingredients cease to be functional when exposed to air and light - every time you open a jar or expose a clear container to light - the product won't hurt you, but the ingredients help you less and less - so you're wasting money, especially when getting expensive products, if they're in jars or translucent containers.
I'm 65, have somewhat dry skin, not too many wrinkles, brown spots in the hollows of my cheeks, and rosacea on my cheeks, nose, and chin.
If i'm in a huge hurry, i do only two things: cleanse and put on sunscreen.
Otherwise, before i get dressed i:
Cleanse - there are many mild gentle cleansers, so i switch off from time to time;
Exfoliate - i use AHA on the sides of my face and forehead; BHA on my cheeks, nose, & chin because of rosacea - must wear sunscreen when using;
Retinol Serum - alternate with exfoliant - must wear sunscreen when using;
Antioxidant Serum + Vitamin C;
Sunscreen with only Zinc Oxide and Titanium Dioxide - yeah, it's white-ish, but by the time i do everything else it's mostly absorbed - and occasionally i mix some foundation into it so it's less white to start with.
I didn't start really taking care of my skin until i turned 60. First i tried some well-known drug store products, but the perfumes in them were very strong and unpleasant to me. Then i switched to fairly high-end stuff, but they were rather expensive, and i began to wonder if they really did what they promised. Then i found Paula Begoun's Beautypedia - http://beautypedia.com - and started shopping for more efficacious products. Someone i work with regularly thought i was in my early 50s, so i guess i'm doing something right.
Beautypedia has really helpful reviews on the efficacy of products. I mostly use Paula's Choice products, but i've found others that are good, too.
Some people complain because she rates her own products highly, but the site rates products by many companies and in every price range, so if you don't want to use hers, you can find products that suit you.
And some people claim she is anti natural products, but many of her own products contain natural ingredients, so that's clearly not the case, if th.
I ignore her makeup reviews because i have very different ideas about what colors and finishes i want to wear, except for foundation, since that covers so much skin.