I pencil boxes for most of my small notions needles, thimbles, pins, pencils, pens, etc. The machine attachments i keep in sandwich boxes, I found these at the Dollar store a few years ago. They are actually shaped like a slice of bread..... I have a box for each machine and label it with machine make and model number and the box stays with the machine so it is always together..
When I am sew I keep a small tote by "31". It has an opening in the middle and pockets all around, so it is always ready to move from place to place. I keep rotary cutters, scissors, seam rippers, pen, pencils and a few basic color threads like black, white, beige.. It works for me