You need a stand-up desk. Why? You’ll live longer, focus more and you’ll always be ready in case an action scene unfolds in the office! Of course, none of these reasons are why I opted to go chair-less.
Try your hand at a stereogram! Make up some gibberish and add it to the end of a page on my site. Here’s an example: http://www.tssmith.net/challengeaccepted.