Salvage short scraps by "stretching" them
First, sort scraps by width and similar thickness. If you have a lot of pieces of the same species, keep those together, too. Rip the scraps to common widths that minimize waste; then glue those of the same width and similar thickness end-to-end with scrapwood runners along each edge, forming planks.
When you need small parts, find a plank of the right approximate thickness, width, and species; joint and plane the plank to thickness; and rip away the runners. Because the plank is connected by a weak end-grain joint, simply snap off short pieces and rip and crosscut them to final size.
—Alan Schaffter, Washington, N.C.