I’ve never not been able to sleep. In the past few years, I’ve happily slept through earthquakes, alarms, crying babies and my own snoring. But if I did have some trouble getting to the land of Nod, my first stop would be to check out the Philips Sleepwave, a tidy little gadget that is “designed to non-invasively stimulate the vestibular nerve by mimicking a swaying sensation”.