The aim? To boost your skin and improve its tone. Using the palms of your hands, smoothe on a hydrating serum, followed by a treatment designed to zap signs of fatigue - close pores, reduce dark circles, deal with blotches... Useful tip: apply a concealer to camouflage the worst offenders. If your dark circles are pinkish, apply a yellow-beige concealer under your eyes. If they're bluey-violet, opt for an orange tone. If your dark circles look like troughs, plump them up with a concealer that contains light-reflecting particles. You could also apply a treatment containing chromatic (or colour-correcting) micro-capsules to even out your skin tone.