* $500 electric desks are out there, you just have to look for them. IKEA has one now ->
http://www.ikea.com/us/en/cata...
* Mixing standing and sitting is good. Moving around is better.
* Your legs will not appreciate standing to begin with.
* Standing will not magically fix poor posture: talk with your chiropractor or better yet take up Yoga.
* Standing will not magically fix an ergonomically unsound workspace setup:
** Make sure that your monitors are the correct height - mid-screen at or slightly below eye level - keeping the head, neck and eyes in a neutral position.
** Note that the appropriate monitor height will change when standing.
** When typing and mousing your shoulders should be relaxed not hunched, wrists should be straight or angled slightly down but never bent back.
* Give your eye muscles a break by regularly looking away from the screen and gazing into the distance.