Stopwatch.

I can measure my computerless time, exercise time...and, of course, many other things 😁

Aeropress coffee maker. $30? Sure I'll try it. Best coffee I've made at home besides a real espresso machine

• boox note3. it's extremely basic, and i mostly use it to hold recipes, but it makes a great e-reader as well!
• wireless earbuds. make working out so much less boring!
• shoe stretchers and shoe stretcher spray. saved me from having to return 2 pairs of expensive boots.

Razer Kishi controller for an old Android Phone running various emulators.

Not quite a gadget but I bought a sleeping mask some years ago and it has definitely made sleeping much easier.

I used to struggle a lot to sleep and having total darkness helps a lot, so I recommend giving it a try.

olight mini led torch. Fits in my pocket and especially during winter months it is so useful.

I got it as a present rather than buying it myself but my tire pressure / tread depth measuring tool gets near constant use so it’s super easy to check on my car’s tires when I need to

I have two items I bought for my upcoming Aviation Maintenance training this December. A usb rechargeable flashlight and a 17-in-1 multitool, both which will come in mighty handy these next few years