How to avoid sore wrists
wglb: I had a friend who was an actor and playwright.  He used a laptop sitting in his lap to churn out lots of plays, but he ended up with carpal tunnel and wrist braces.  Be sure that the laptop is at the correct height.  This is when the tops of your hands are level with the tops of your arms.  And there are many other good suggestions in the threads here.I also would get an external keyboard, as very few laptops have good enough keyboards for high-throughput, long hours work.