Sometimes it's just habit. If you get in the habit of coming home, getting changed, and going for a run every day, then after a while you end up doing it without thinking. If you are in the habit of coming home, cracking a beer, and drinking it, you end up doing that without consciously thinking about it. TV can be the same way; how many sitcom reruns have you watched in the name of "unwinding"?
Try something else, be it exercise, a cup of tea, or reading. Change the tool that you use to smooth the edges.
Pretty much the plan (as I understand it) behind starting Fog Creek, right? Rather than starting a business to get rich, create yourself a place to pursue your own interests and get paid while doing it.