When making repairs or taking apart equipment, be prepared for the occasional dropped part. Clean off a section of your workbench and spread out a smooth shop or dish towel. The towel will keep errant small parts from rolling around on the floor and getting lost. For small jobs, even square shop rags will work; for larger jobs cover the bench with salvaged carpeting.
A sharp pencil is essential for making accurate cuts. To keep the pencil point sharp, rub it back and forth a few times against a sanding sheet. This will give the pencil point a chisel shape which is excellent for marking.