When I'm lying down, I play my Nintendo Switch flat on my back, facing upward and holding the console up in the air; I do this because I wear glasses, and playing on my side usually gets in the way, both because of the glasses and because the Switch is big and kind of heavy XD. Another way I play is by lying on my back, placing a pillow on my chest, setting the Switch on top of it, and using the kickstand to keep it upright. It works really well that way, and if my hands start to hurt from holding the Joy-Cons in the same position, I can just detach the controllers. The perks of being flat-chested, muahaha! Another method is playing while sitting up, with one pillow supporting my back and another on my lap to rest my elbows on!