After a year or so of reduced computer time (to zero at my worst) I am back to full-time computer work. Sometimes working long hours and weekends. Sigh.

Using stand-up desk and hand-held mouse to reduce bad posture.
Having frequent breaks, walking 20-40 min plus light exercise 3 times a day, working from home on Tuesdays and Thursdays so that I don't have to drive to the office two days in a row.

So far so good.