Earlier today Parent Hacks reminded me of a significant geek family event, TV Turnoff Week. Jim and I both added comments about Turnoff Week's influence on our family long before we even had kids.
We discovered TV Turnoff Week through Canadian media activists Adbusters.org, but the event and its ideology aren't limited to the anti-commercial set. It's advocated by children's fitness organizations, both major American political parties, the American Medical Association, the American Academy of Pediatrics, outdoor appreciation groups, environmental groups, children's organizations, and numerous educator groups.
You don't have to try it, but you might just have some fun if you do.
Wikipedia article on TV Turnoff and links to other sources.