My go-to skincare product has to be a moisturiser with SPF in it. Currently I'm grabbing the Revolution Oil-control SPF30 moisturiser, as I've had to find some budget changes to my usual more high-end SPFs. It is so important to protect the skin, even in cloudy days, and because I drive a lot, it's easy to forget the sun is shining through the window onto my face!
SPF really helps to protect skin against damage from UV rays, and hence this is my go-to skincare product.