This chevron pattern is made up of flying geese blocks using rectangles and squares. My rectangles were 6.5x3.5 and squares measured 3.5. Two squares for each rectangle. I mark the center of the square pieces as normal for this block, on the wrong side of the fabric. Then using a 1/2 inch ruler I mark a second line off to the side. If you don't have a 1/2 inch ruler, just move your ruler over half an inch and mark the second line.
Do this for all of your square pieces.
Align your square and rectangles, right sides together. Stitch on the center line as usual to make your flying geese block. Chain piecing is a big help here! Once you've finished with your chain, remove the entire chain and feed it through again this time stitching on the second line you drew. You don't need to snip in between pieces until both lines have been stitched.
Now cut right down the center of your two lines. You will have your flying geese block and your HST bonus piece! Repeat with another square to complete your flying geese block. The great thing about using this method for flying geese is two bonus pieces for each block, yay!
And each quilt will make mounds of bonus pieces! All ready to go just need ironing and squaring up! These HST measured 2.5 inches after squaring up.
Bonus pieces aren't limited to flying geese blocks. You can use this method anytime that you're cutting away a corner. I use it often when making star blocks. It's easier to piece HSTs while they are still part of the square. Once you cut the corner away if you want to put the two triangles back together again you'll end up sewing on the bias which is tricky since the bias is stretchy and the corners always seem to get sucked into the sewing machine while trying to piece them.
A few projects I've made with bonus pieces when making this quilt
Chevron Doll Quilt
HST Pillow Sham
My argyle pinwheel pillow was also created using bonus pieces from a star quilt. There are about a bazillion things to do with HSTs!