I made a Midi bag to be my "busy bag" I use to use a Bow Tuck; both are just standard bag patterns with lots of space inside. There are so many needle book patterns out there some free some for a fee. Most people embellish them with a saying or make a crazy quilt block then use that for a book cover. I also have old cigar boxes that I store each project in so pieces don't get lost. I have seen some use old sewing, cookie, mint tins to store needles thimbles and other little necessaries. Can't wait to see what you come up with :-)