I forgot what a pain it is to add tiny, fiddly, dropable, loseable PE parts! LOL
The tricks... hydrate lots when modelling so the hands don't shake, and avoid modelling over carpetted areas!
Yes, the tiny, dropable, loseable parts are a pain for sure. But I have a method that helps.
I always keep a flashlight beside me when I'm working on such parts. If I drop a part, use the flashlight.
No, don't shine it down on the carpet (even a tile floor is sometimes hard to find some parts on) from above, but instead lay the flashlight down on the floor and shine the light horizontally over the floor. You won't see the part any better, but what you DO see is the shadow cast by the part, and it makes it much easier to find.
Just yesterday, I was reducing the size of a metal watch bracelet that the store I bought it from said couldn't be made small enough to fit me. A little U-shaped spring sprung and landed on the white, grey and blue flecked tile. I knew about where it was because I'd heard it, but still couldn't find it after 5 minutes of trying. So I went to the other room, got a flashlight and spotted it within 5 seconds.
I still couldn't actually see the spring when I looked directly at where the flashlight revealed the shadow, but reaching for the shadow, it was easy to pick up.
The watch fits perfectly now.