Medical research from NIH is telling us that sitting for long periods is killing us. Lifehacker has a nice set of suggestions of how to not get stuck in that chair. Get up, move around and even stay more productive. Another alternative is to stand. Standing desks have been in vogue for the last decade. In the late 90s I remember a business trip to Sweden and most of the desks there were both mobile (with wheels) and they were stand up work areas. Take a gander at this desk on Google+ and see if it inspires you.