Whenever I use fusible tricot interfacing in a project I cut all the leftover pieces into 1/2" wide strips on the lengthwise grain. My rotary cutter makes this go really fast. I keep the strips in a bin separated by color and fuse them to the shoulder seams of my knit garments. Since I only need four or five inch long strips anyway, it's a good way to recycle interfacing scraps. I actually prefer the interfacing strips to fusible stay tape since they are lighter in weight.
Added note: the longer strips are just perfect for interfacing the narrow front band of cardigans like Kwik-Sew 2759.