https://www.lesswrong.com/posts/22SuXhyWAqPMTsBPk/what-are-objects-that-have-made-your-life-better
For example, for me one of them is having a small bluetooth keyword which I use with my iPhone on the plane, Uber, at cafes and restaurants.
Digital multimeter. Diagnose basic electrical problems in house, car, etc. ~$20.
Chemex coffee maker. Best way to make coffee. (Was a gift.)
Cuisinart chef’s knife, ~$30. Still a cheap one, but good enough to make preparing food more of a pleasure.
Plastic organizers for SD cards. Multiple little compartments with lids. ~$10.
GigSky sim card: internet access anywhere in the world. ~$30 for card + various short-time plans that you buy as you need them.
EDIT: I guess I should say a bit more.
If you cut a couple of wires every day you don't need these. Any cutters will do. If you have a wide range of wire that you need to cut, from very fine copper to not so fine steel you don't want these, because they'll break.
But if you're spending all day, five days a week, cutting 7/02 or component leads, then these are lovely. The edge is sharp and stays sharp (so long as you don't do stupid things like cut steel), the pivot is smooth, the pivot is solid (my cutters had no wiggle after years of heavy use), and the handles are comfortable. The spring is plastic and clips into mouldings in the handles, so it's a part you can maintain.