I work fulltime in our local college, when I was teaching I tried to balance myself on the edge of the desk to take some of the weight off my feet. I now work in college management and am responsible for my own activities which helps. It means I can sit or stand or walk when I need to, I find I need to do all of these throughout the day to get by. I also have a small footstool with a moveable top under my desk so that I can keep my feet moving, this keeps the swelling down.
Working for me is a necessity as I would just wallow in pain if I didn't keep going. Weekends are bad as I collapse in a heap and sleep, pain is just so exhausting.....
My advice is to try to keep as busy as possible throughout the week, I cant advise on weekends as I haven't found the solution yet