Thankfully, my resting splints are nothing like the ones a colleague's mother used in the 1970s. Apparently, she broke her husband's nose with one when she rolled over in bed. An occupational therapist made mine from a light-weight material called hexalite.
If you don't have resting splints, tightly roll up a hand towel. Then, while you're resting, watching television, or enjoying the sunset, you can drape your hands over the towel, so that your wrists are in a relaxed and supported position.