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.
I just let my thermostat alert me, based on run time. It worked with my old programmable, it works with my Nest (yeah, I know). And since I buy 3-packs of the filters, when I get down to the last one, I just add "16x20x1 filters" to my shopping list. When I'm at Wallyworld or Home Despot/Blowes, I'm there for a reason, open my shopping list, and see the filters listed...
I signed up for Amazon's repeat delivery, which not only reminds me to change it (oh look a filter showed up time to change!) but it saved me money too. It's way cheaper than that subscription program (I looked at that too).
No affiliation, not even a subscriber -- just had a "duh" moment when I saw their ad.