Yoga Nidra is a guided practice that allows you to access a state of consciousness between waking and sleeping. During this practice the mind & body will begin to switch off. It is often used to aid sleep and help reduce stress & anxiety. Like any meditation, it’s about finding the right one for you. Give it a try. Make sure you are warm & comfy enough. Ideally place something over the eyes. Not only will the dark help quieten the senses,the weight will help calm your nervous system.