A small "Proud Grandma" type purse photograph holder is a good way to carry several swatches at a time. I cut the selvage dots and an inch or two of the fabric off and put it where a photo would go. As you find fabrics you can cut off a small piece and add it to the pocket holding the original fabric so that you don't get more of certain colors than you need. This is especially helpful if you are shopping at more than one store or over a period of time.