I think genetics must contribute, both my parents have always looked about 10 years younger than they are and hopefully a little of this has rubbed off on me.
I did smoke from teenager to 40 (gave up last August) but so far there doesn't seem to be evident damage.
As a QVC addict, I have been buying the brands like Elemis, Decleor, Liz Earle, Gatineau and Philosophy because of the Todays Special Value and other special offers, but do think good skin is primarily due to protection from the sun, hydration, sensible alcohol intake, proper nutrition etc - and of course, genes.
Keep saying that once current stock of products used up (and there is a lot!) I will revert back to straight-forward tried and trusted brand names.
My mum is never without her Oil of Olay!