I have a sit/stand adjustable desk. Here's what I do:

1. Stand for first ~1 hour of the day.

2. Depending on how I feel, alternate sitting/standing about every hour or so until lunch.

3. After lunchtime, stand for ~30-60 minutes.

4. Repeat step 2 until end of day.

I also walk for ~30 minutes/day in the mid-morning. When I return from that, I sit.

I also take eye breaks and try to use a pomodoro method (25 min working, 5 min. looking away/etc).

The key to feeling good seems to be variety, as the article implies. I can't ever go back to a sitting-only desk arrangement.