$5.99 magnetic measuring spoons. They stick together and nest.
$18.99 MagSafe phone car mount. I use iPhone and my car supports Android Auto/Carplay, but there isn't really a good place to stick your phone. This thing is basically a big magnet, I plug my phone in, throw it on this thing, and we good. Worth noting, even if you have CarPlay (guessing Android Auto as well) even though you don't need to use your phone, some apps have some functions when you're using them in this manner. EG: maps displays the next few turn by turn directions on the phone screen, and the overview of the map on the carplay screen.
decent/good chef's knife. I think the one I'm using now is about $30, but you can get the ol' reliable Victorinox for around that price or a little cheaper.
cabinet lighting pucks. I think Walmart has them for like $12 for two, but they are basically stick somewhere, motion activated lights that are battery powered. Paired with rechargeable batteries, I can now see the food that we push to the back of the cabinet to die.
new streaming stick thingy. Though I greatly prefer Apple TV, it's hard to justify the price of those compared to Roku/Fire TV. That said, if you're hanging on to an older version of the Fire TV/Roku, upgrading helps the annoyance factor because it's just far less slow. We just added a $24.99 4k Fire TV stick, much nicer.
Wireless chargers for phones. You can get them for like under $10. Buy 5, put them where you generally set your phone down. Or more simply, right next to the bedside. I generally only charge at night, so much nicer to be able to just drop it on a pad/magnet, etc.
$9 dimmer switch. Our master bath is weird. The toilet/shower area has a door. The sink area connects directly to the bedroom with no door. The sink area has large mirrors and massive amounts of lighting. Fucking sucks if you're just getting up to pee and you now have the light of the sun on you and your partner at 3am.
more niche, bunch of smart home shit:
just think about how $10-$20 and a little bit of thought can improve your life. I have a switch connected to my espresso maker, now I can yell in the shower to turn it on to pre-heat. If I had a regular schedule, I could automate this further just on time. I have it set so that once I tell it to turn on, it turns off after 20 minutes.
motion sensor lights. though technically you don't need a smart home for this, there are some lights in my house that I only want to turn on when someone is there. I have a hallway, for example, that is more or less a cave tunnel. Any time I'm in that hallway (or anyone else) I want to have some light. So I have a motion sensor that turns the light on, and based on the status of the sun, it dims accordingly. When I walk into my garage, there are a few lights that turn on in sequence and it feels like you're walking into the bat cave.
buttons! You can buy many different remotes for < $20. Pretty much anything you automate via voice you also need a button for. Pro-tip, use in-wall switches where you can, but in my case I didn't have a neutral wire because it's an older house, and my options were pretty limited/expensive.
last example: my entryway lights. I have a door sensor ($10-15) so if I open it I can perform an action. My entry light has a smart bulb ($9.) I also have a floor standing lamp adjacent to this that has a smart bulb. What this allows me to do is check when I've recently arrived, and if it's after sunset and the bigger light isn't already on, turn on this entry light. If my TV is playing a movie, the light goes on in the dimmest setting so arriving people don't disturb.
This, entirely. I remember back 10, 15 years ago, rechargeable batteries were trash. Gave them a second shot recently, and I'm genuinely surprised. They're as good, possibly even better than, non-rechargeables
For me, an under-the-sink trash can that hands on the cabinet door has been a huge QoL improvement.
A back scratcher.
Much more situational, but our back gate has a padlock that was originally different from our house keys. Kwikset actually sells "programmable" padlocks so now it is the same key as our front door, which makes life a tad easier.
A computer mouse that fits my hands.
Enough phone and laptop chargers to not have to constantly go to another room to grab one.