I really like e4's response so much I printed it and included it as part of my "class pkg" in each of my sewing machines. In addition, I would add the instruction manual for your machine, extra rotary blades, seam ripper and small trash bag. I also include a make-up brush with my machines not to freshen my make-up but to brush the lint off between projects... I am really liking this thread! Thank you for starting it. I feel I'll only need to grab my fabric and pattern next time I'm heading off to a class. And, yes, I label my machine, the carrier and as many of the tools as I can. Many of us have the same brands, colors... it's too easy for someone to walk away with your tools, even if unintentionally.