For skincare, watch Nadine Baggott's 5 ingredients video.
Skin needs to be clean- you need a cleanser. It goes down the sink or in the bin on a pad in 30 seconds. No cleanser is worth spending on.
Skin needs to be hydrated. Moisturizers can have fancy stuff in, but don't need to. Look for glycerine, squalane, niacinamide as top ingredients. Anything below the first 5 ingredients won't probably be in enough of a concentration to do anything other than let the company call itself a "retinol cream".
Skin needs to be protected from the sun. Always. Even on a cloudy day. SPF 50 and it should be separate from your skincare or makeup because you don't apply enough.
Those are the non negotiables and you just use whatever you like because none of them are going to do anything other than what's in their job description.
A vitamin C serum in the morning. Will make a huge difference in terms of glow. Again, doesn't need to be spendy. Geek and Gorgeous has the exact same formulation as Skinceuticals but costs about £80 less. Skinceuticals is the gold standard, but the formulation has now trickled down to the high street.
A retinoid at night.
Start slowly. OTC retinols are about 0.3% which is a good entry grade. Check the type of retinoid. Granactive, for example, is not yet proven by the industry as doing a great deal other than helping along other ingredients yet on packaging can often make it look as through a product has a high percentage of retinol. Build up slowly and remember, retinoids are a long game thing.
I started on entry grade for a year, moved to 1%, then up to Tret, and have now come back down to retinAl which I prefer.
Currently using:
CeraVe oil cleanser
Superdrug vitamin E hot cloth cleanser
Sali Hughes vitamin C (will repurchase if I can't get hold of Geek and Gorgeous)
La Roche Posay Toleriane moisturizer
ELF retinal
I alternate between Toleriane and Astral/Nivea at night.
For makeup, I always go back to N7 Hydraluminous and Dior Pump and Volume mascara. Revolution Pro CC finishing powder is translucent, finely milled, and the best I've ever used. Clinique quickliner for eyes and Mac paint pot in groundwork and I'm done. (I'm going to try the ELF dupes for the Mac when that finished)