Bodhicitta - in response to your question, this is my daily regime (I would describe my skin as normal/combination btw):
Morning - wash face with Epionce Gentle Foaming Cleanser (usually foaming face washes are bad, but this one is good!). Then mix my moisturiser (Epionce Renewal Facial Lotion) with a few shakes of Exuviance Vitamin C Booster powder and apply to face/neck. Previously I used Skinsceuticals C E Ferulic vitamin C serum, but I found it went off fairly quickly and was also quite expensive, so my Derm recommended the Exuviance powder instead.
Apply a non-comedogenic SPF. It must protect against UVA rays as these are the ones that cause wrinkles! UVA rays also cut through clouds so apply even on overcast days. My Derm recommended Heliocare as a brand that doesn't make people break out and I have to say that it is the best one I've tried. She said you need to apply every 3 hours which I am guilty of not sticking to, but if I'm going out for a while in the afternoon I will reapply before going out. I use the Silk Gel 30+ (which has the nicest texture) most of the time, but if I'm really going to be out in direct sun I'll use the Gel 50+. I also just tried a sample of their new 360 degree version and I really loved that and will probably buy it next time. These products are all available on Amazon. I also often wear hats now and try to walk on the shady side of the street (I got that tip from an interview I read with Julianne Moore - she has amazing skin!).
Evening - this was my original regime, if I recall correctly: wash face with same Epionce foaming cleanser. Apply Epionce Lytic Lotion (this is also a wonder product with high levels of Salicylic Acid, so it is like a chemical exfoliator and really retexturises your skin). Wait five mins. Apply same Epionce moisturiser as above. Wait five mins. Apply Tretinoin 0.05%. (Apparently the moisturiser buffers the Tretinoin so the side effects are not as extreme, but I think it may also make it less effective.)
This is my current evening regime: wash face as above, then on alternate nights apply the Lytic lotion or the Tretinoin. I don't use a moisturiser as I don't need to buffer any more and I read that to get the full effects of the Tretinoin you have to apply the Tretinoin, wait 30 mins (or was it an hour?) and THEN moisturise (I can't be bothered with this, plus my skin doesn't really cry out for a moisturiser so I'm happy to go without). I also tend to apply the Tretinoin straight after washing my face, but this causes problems for some people.
So, in summary, under my current regime, one night I apply the Tretinoin and the next night I apply the Lytic. I should probably do Lytic every night, but I am too lazy...
I occasionally also use Exuviance Triple Microdermabrasion Face Polish (with Glycolic Acid).
I get the Epionce products from a UK website 'Beauty Product Online' but they are much cheaper to buy if you (or someone you know) goes on holiday to America.
Also, I have read that many Derms recommend Cetaphil facewash when using Tretinoin. That is quite a bit cheaper than my Epionce facewash, but I feel like it never really removes makeup or mascara, which is why I prefer the Epionce foaming one. Apparently it is important to avoid foaming facewashes which contain sodium laurel sulfate.
Again, if any of this info is wrong, please someone speak up!