I found this refurbished antique organ stool and it's great. I used to use my rolling desk chair but it would push away from the sewing machine when I sewed. Then I used a dining room chair but I was always twisting my back when I tried to move from machine to cutting table. The stool swivels and I can move from machine to cutting table and then to my computer on the right (not shown in photo). What a find!!!
Another tip is an egg timer. Sometimes I start sewing and HOURS go by before I know it. Now I set the timer for 1 hour, when it rings I get up use the exercise machine for 10 to 15 minutes. It helps with relieving back pain and I don't feel so guilty about not going to the Y.
Antique (refurbished) organ stool