"Small cup, will travel!"...
...the weirdest bit of health advice I think I read during all of last year was to get a smaller cup / glass for your desk (office or home).
The idea being that you then find you have to make more frequent trips to the water cooler / kitchen to top-up and refresh your cup, and that in so doing you make yourself more mobile through the day, you break off from screen starring more often giving your eyes a rest from eye-strain, and that it leads to a greater probability of interacting with people you work with by becoming more social, also perhaps even burn more calories through the work week.
I think it was from an office based tips list that I stumbled across online - though I sadly don't remember the source of this simple sage advice. Now because as I said I don't remember the specific source of this nugget I can't remember what they were pushing as the prime reason to get a smaller cup - I fear it may have been the calories thing, but I'm going to use rose tinted hindsight and suggest that mobility and stretching during your day helps keep you loose and active.
Whatever the case I found it it is useful and actually seems to be having an effect in as far as I end the day less stiff, tired and knotted from desk working.
Give it a try - "from small things big things one day come...", and all that :-)