WEAR GLASSES

Try wearing blue light-blocking glasses after 7pm and avoiding bright screens. Natural light loses its blue tones after sunset, whereas electric lighting, LED lights and digital screens all have a strong blue-light component. Blue light suppresses melatonin secretion and can shift your natural sleep rhythm by as much as three hours, so you don’t feel sleepy at night. £39.99, sleepbetterlive betterstore.co.uk.