Ever since I saw the movie Altered States in 1980 I have wanted to float in a sensory deprivation tank. This type of relaxation technique is now easily accessible and available at local spas. My girlfriend got a discount coupon for a floatation session and asked me if I was interested. She expected the answer to be no. I said absolutely. And we booked the appointment.
Each of us entered our own private room with a changing space, a shower (for before and after) and an enclosed room to float. The body temperature water had 1,000 pounds of magnesium salt to ensure floating. Over the course of the hour floating in the dark you really lose the sense of where your body ends and the water begins.
It was a very relaxing experience, but you have to be willing to relax your mind and be comfortable with your own thoughts. It is a good cure for phone addiction because this level of relaxation keeps you from wanting to get sucked back into the endless scroll of a mobile device.