Maybe I'm a bit overkill, but I have one of those 24 compartment containers for each laptop, with small magnets on the side of each compartment, and silly putty at the bottom of each compartment. The magnet keeps the screw from falling out if it gets tipped, and the silly putty grips non-magnetic screws for the same purpose. I use different colored washable gel markers or crayons to mark each screw, as well as the spot where it came from. Some laptops are easy, and use mostly the same screws, but some are a nightmare. I heard of a case (Phone, not laptop) where one of the screws was just slightly bigger than another, swapping two screws that looked the same to the eye resulted in a damaged PCB.