Not sure if you have noticed yet but I am a bit of a skincare obsessive. I am a big believer in very thorough cleansing; even if you don't do much else, cleansing and moisturizing should be on everyone's list. A little step up from this is exfoliation. And I am not talking about scrubbing your face with grainy facewashes (honestly, they probably do more damage than good - ESPECIALLY to acne prone or sensitive skin) but about a gentle cream or liquid exfoliant.
One of my firm favourites, something that I have purchased time and time again is the Elemis Papaya Enzyme Peel. It is a thick cream and exfoliates the skin with natural Papaya and Pineapple enzymes, it also contains other active ingredients like Porphyridium (unicellular algae), Bladderwack (seaweed extract), Milk Protein, Sunflower Oil, and Vitamin E - all good for your skin : )
It will leave your skin smooth and take a way any dead skin (so those flaky bits that look so horrible with foundation on will be gone!). The cream is very gentle and suited for pretty much all skin types - it is particularly good for more mature and delicate skin as it contains no particles or grains that could do damage.
I cannot recommend this product highly enough, especially if you are a regular makeup / SPF wearer! Next time you pass an Elemis counter check out this product, it's really worth it!