I have been trying a little experiment for the last 3 weeks and am having some good results. Always have been a side sleeper left side mainly due to being deaf in the right ear when I am on my left side the noise around me is null and void so i get a good sleep however due to sinus problems or inner ear problems I wake up in the am lots of times feeling dizzy and off balance like the fluids sit to one side til I get aroundt to moving about.I now have been sleeping in an almost an upright 60* position and have been waking up feeling alert and better than ever. May be coincidence but 3 weeks and still feeling great when I first get up .Anyone else sleep upright rather than flat on back or side.