DIY button-up + how to make your own button-up pattern

I have always been intimidated by making button-ups from scratch (without a manufactured pattern), but as I was dragging another bag to the thrift store I decided to take a few of the pieces that I could possibly make a pattern from. So I grabbed a pair of jeans, an overcoat and a yellow button-up. I had NO idea how easy it was. Just quickly cutting out the top into pieces and make a pattern from those pieces onto paper (or if you want the old top can be the pattern).

top: self-made   pants/jacket: hm     shoes: sam edelman 
P.S. Beck with no tripod took a lot of these photos...the tripod did the rest. But isn't he talented??
Supplies:
old button-up
scissors
pins
sewing machine
thread
optional: paper

Instructions:
On #2 when cutting out the pieces or making the pattern, if using a thicker fabric, you don't have to cut the extra yoke piece if you don't want (but it will look nicer on the inside of the garment), and you won't have to do interfacing. But if you are using a lighter fabric, you will have to cut interfacing for the yoke, collar and the little long piece and a long inch wide piece to slide inside the plackets. 5. Sew the plackets (where the buttons/button-holes will be) but folding the edge of the center of the front 2 pieces under a quarter inch, and then 1 inch more. Pin. Make sure the top two pieces over lad by an inch and are as wide as the back piece. Top stitch the edge and just under and inch from the edge.
6. Sew the back yoke (the plaid piece in back) to the black piece.
7. Top stitch into place
8. Sew the front two pieces to the back piece by sewing the sides and shoulder seams together. 9. Sew the two collar pieces together right sides together.
10. Flip right side out and topstitch the edge of the collar.
11. Get the 2 skinny long pieces with the flat edge pointing up, pin the raw edge of the collar in between the two long pieces.
12. Sew all three things together following the curved edge, leaving a half inch or so from the edge of the curve.
13. Iron/topstitch the curved long piece down following the curved part. Leaving the flat edge and a little of the curved ends open.
14. Iron under the flat edge a quarter inch 15. Slide the neckline of the shirt into the ironed under opening of the long little piece. 16. Sew up the sleeves into a tube.
17. Slide the sleeves into the arm openings (right sides together) with the taller seamless curved part lined up with the shoulder seam and the sleeve seam with the side seams.
18. Pin together and sew.
19. Hem the bottom and the sleeves at least one inch and done!