Layering is a skill. I know, I know - as skills go, it's up there with coding and crochet (both mega) but, for those who're baffled by the proper product order, we've compiled this guide to creating the ultimate skin care sandwich.

Work from lightest to heaviest - serums or 'essences' come first as they're most readily absorbed (and usually the most targeted). Their low viscosity enables them to penetrate most deeply, where the potent actives set to work correcting your skin's 'issues'. Su-Man's {Rehydrating Toning Essence} feels like water but is brimming with hyaluronic acid to maintain moisture levels, while Omorovicza's {Radiance Renewal Serum} is rich in white lupin to energise and revitalise.

Add an antioxidant - especially if you're a city-dweller. Either add some vitamin C to your serum (Skin Design's {C Antioxidant Glow - Vitamin C} is ideal), or apply a second, free radical-fighting serum on top of the first. Zelens' {Intense Defense Antioxidant Serum} has a featherweight formula and 18 active ingredients to ward against the everyday environmental onslaught, while The Ordinary's {Resveratrol 3% + Ferulic Acid 3%} is a formidable, pollution-trapping asset to your age-defying arsenal.

Take your time - which isn't always easy when you're trying to actually leave your house, but allowing your products to 'sink in' will minimise the likelihood of 'pilling' (you know those weird grey worms? Yeah, those). Try to integrate your skin care with your usual morning ritual - apply a serum after showering, then have your breakfast/sink a coffee/find your left shoe, before the second step.

Seal the goodness in - with a day cream, gel or lotion, depending on your skin's hydration needs. MV Organic Skincare's {Rose Soothing & Protective Moisturiser} is a winner for those with sensitive complexions; brimming with rose extracts, it works to strengthen fragile skin whilst calming redness and reactivity. Or opt for Pixi's {Glowtion Day Dew} - ideal for dulled, congested complexions it stars kaolin and lavender alongside light-reflective particles, to help eliminate impurities while granting a gorgeous skin-finish.

Up the oils - as a rule, oils are able to penetrate creams but not vice versa, so warm a small amount between your fingertips and press onto dry areas. Tata Harper's {Replenishing Nutrient Complex} is packed with protective and reparative botanicals, to bolster skin's defences (and has a convenient rollerball, for quick 'in-transit' application). And at night-time, use a retinol-rich formula - moisturising helps the retinol to penetrate while lowering the risk of irritation. Sunday Riley's {Luna Sleeping Night Oil} is a beautiful blue elixir which works hard to 'undo' the day's damage as you slumber.

Finish with an SPF - yep, even when its depressingly grey. Susanne Kaufmann's {Sun Cream Cell Protection} is completely non-chalky and won't clog your pores while providing sustained, broad spectrum SPF 30 defense against the damaging effects of UV rays.