Ergonomics is really personal. I’ve tried a few ergonomic chairs, and they are all too big for my body. At the end of the day, the trusty old ikea wooden chair works the best for me, despite the lack of any adjustability, because it is the right size to begin with.

When standing, I strongly agree with the article that getting some sort of rug is good for comfort. I have a very furry rug for it.

Moving around often is the most important factor, which is easy for me because I like to walk around while thinking.

I find trackballs very tiring on the thumb. Vertical mouse is quite comfortable. Ergonomic keyboard seems unnecessary to me, because I type with straight wrists on a normal keyboard anyway.