For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
DNS filtering. I’m using NextDNS, because I can’t be bothered to be my own server admin.
Why? It does a great job at filtering out ads, tracking the rest of internet cancer on mobile devices. Works no matter where you are. With pihole, you get the filtering only when you’re at home, not when you’re scrolling funny cat videos while waiting for the train.