I use sandpaper to hold my fabric when drawing lines on it. I use a small basting brush to clean my machine. The most useful tool I have is what looks like a screwdriver but it has a long wand with a magnet on it. Great for picking up pins. I have one of those racks to store pan lids in to use to hold my many folders of patterns. A mason jar is a handy holder for my clover iron.
This is a great topic.