Here is what I do. First, I print a page of freezer paper (FP) templates from my Inklingo designs, and cut them out. Next, I iron a FP template onto the back of the small scrap, rotary cut around the template, peel away the paper, and mark the seams with pencil or chalk marker. The piece then goes into the project container, and it's ready to go. I keep the FP templates to reuse on the next scraps.
The FP templates may be used with, or without, seam allowances. For my purposes, I choose to leave the seam allowance on the pattern to ensure the template will fit onto my small fabric scrap (with the necessary allowances).
#1 shows some small odd shaped scraps.
#2 shows the Inklingo FP ironed onto the fabric scraps.
#3 shows the shape cut from the scrap and the left-over tiny scrap (which I finally toss out).
#4 shows the piece with Inklingo FP removed and the seam allowances marked by hand.