Smart vacuum cleaner. You buy it once and never have to vacuum again.

A multitool or swiss army knife: I recommend a Leatherman or Victorinox fit to whatever your daily needs are.

Personally, I swear by my Leatherman Skeletool CX in my pocket and a Victorinox Midnight Manager on my keychain.

Electric toothbrush, I feel so cleeeeaaaaan!!

My Victorinox SAK (model Tinker Deluxe) it just comes in handy so often and I'm glad I've got it around.

My Aeropress. Great quality, espresso-adjacent coffee quickly and easily in the morning.

Laser thermometer. I learned a lot about better temperatures at which to cook things and now get more repeatable results when cooking.

Kitchen scale. Recipes are easier to prepare when weighing ingredients as opposed to using measuring spoons and cups.

Both make food a better experience, which leads to more satisfactory meals and eating less overall.

Dry herb vape: I mainly use it with cannabis and for me it gives clearer effects,better taste, use wayy less material (I can use 0.05-0.1g per bowl, which is enough for me for a whole night), more control of the high when wanted (different temperatures gives different results basically). More easy and discrete to operate on the go, and not bond to smoke a whole j if I decide to get high (last two depends on the device though) and also gave me a fun hobby.

If you want to buy one, fell free to ask for advice at !vaporents@lemmy.beyondcombustion.net and be aware as some devices at regular shops are health hazard (looking at you, Gpen)