|From my tips elsewhere you know I use a lot of interfacing. I buy it at 50% off in large quantity at Joann, or when I see grab bags of various interfacing cheap at other stores. One tip I picked up somewhere was to save leftovers to cut strips, 1" wide and keep them in either a ziploc bag or a bag made out of the plastic instructions wrapping that comes with the the interfacing. These strips are handy to have for any shirt that will have buttons, buttonholes, snaps, to fuse on and reinforce the area. To be discarded a piece of interfacing has to be mighty small. Magazines that provide "full size patterns" (on a pull out or in the magazine) often have quite small individual pieces that could easiy be traced onto a piece of interfacing, sparing the integrity of the book (for potential resale?). And patterns you have already traced onto facing and decided you won't be using any more can be saved for smaller patterns you may want to trace in future. Small bits of fusible can be used for applique (see tip elsewhere on fleece and fusible interfacing).