This was great. I'll use some of the tips for myself, but the biggest one, about the periscope glasses, I had to interrupt reading your article to send to my friend. It was that urgent. She also has an injury that prevents her from being able to sit for more than about 20 minutes without pain, and works at a standing desk. She'll take breaks to lie on the floor when she gets tired of standing. With periscope glasses, she could continue working in comfort from the floor!