Make-up products – those with ‘wet’ or creamy textures such as blusher, foundation, cream eyeshadow and most especially mascara – need to be replaced regularly. Trouble is, it’s easy to lose track of how long we’ve been using something. Buy a pack of sticky dots from a stationer’s, write on the date and stick it somewhere on the underside/end of the packaging. (If you’re really clever, you’ll get a colour code going for three   months, six months, etc.)