I have all the gadgets but my favorite notion, a gift from my sweet daughter, is a thread catcher. It's fabulous for having pins handy and all those cut threads go right in the holder and off my floor and out of my vacuum cleaner beater bar...
The prettiest and best made ones I've ever seen come from Ann Chalk @ www.nstitches4u.etsy.com Her items are beautiful.
Try one and you'll wonder how you ever lived without it. (in fact, I now have two: one by my machine and one shared with my ironing board and cutting table.)