I'd say probably a Kindle and an electric toothbrush:
Kindle Paperwhite (~130 USD) - Was addicted to social media for a while so I decided to get into a healthier hobby, and I'd wanted to get into reading for quite some time. Instead of a tablet or an actual physical book (I have nothing against it; I actually prefer it but I have storage issues), I opted for a Kindle cuz it has no intrusive notifications, and I can bring it anywhere, at different times and lighting situations.
Oral-B Electric Toothbrush (~25 USD) - One of the best purchases. I like brushing my teeth in general, but having an electric toothbrush feels even better cuz it makes my mouth feel cleaner than before without having to exude much effort, and the strokes are not inconsistent.