A service like DSC that I thought was brilliant is that one that does air conditioning filters. I forgot its name, but I always forget to change my filter, and you're only supposed to do it every 6 months. Then because it's been so long, I invariably forget what size I need, buy the wrong one, have to go back... Ship me a filter every 6 months? Awesome! THAT'S a company I see as "adding value".

No affiliation, not even a subscriber -- just had a "duh" moment when I saw their ad.