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.
Wireless charger for my phone. No more fiddling with cables.
Some little wireless ear buds. I just got cheap ones but I use them all the time, they’re small, the case charges them, so they last ages. The sound quality of mine is mediocre, but I’m sure there are ones with better sound.