This might be an obvious trick for a newbie but I was tired of loosing jewels, you know how they shoot off into space even though you moisten the tweezer tips
Well, one day I was in the local Chinese $ shop and I saw these fluorescent green silicon baking trays, they come in all sizes, they are round, square or rectangular, and they're kinda sticky to the touch, tacky. I started to use them for movement disassembly, the great thing is, if a small screw, jewel or any part takes a sideways fling, it hits the tray and sticks to it instead of bouncing into a dark void, never to be seen again. They're great for every job because they're also floppy so it conforms to your chin if you have to get close and personal and I must admit, that my losses have been reduced to almost nothing, plus, they're cheap enough to buy a dozen and they clean up good
I found that I use a round one that's about 30cm in diameter more than the other shapes, nothing slides around and it's great for removing jewel settings and working on the balance assembly
Chris