Two things that made the most difference for me. 1. Wacom tablet, basic level. I developed RSI (because of mouse clicking) in 2007/8 and using the tablet in Mo

Two things that made the most difference for me. 1. Wacom tablet, basic level. I developed RSI (because of mouse clicking) in 2007/8 and using the tablet in Mouse mode helped hugely. 2. Coccyx cushion