I use a light weight interfacing for the foundation. I cut the foundation to the size I wish.
I start by placing a triangle on the very top. Layer the strips according to this starting point.
I try hard to not get to the side and really off center or your chevron takes a turn for wonky and that I love. But I must lean off center.
I considered a chevron border on this quilt, but decided not.
You can see what can happens when you put a chevron border on a quilt.
This is one quilt that I treasure. Its called "Beach House CQ" and was part of the 2012 Quilt Festival in the U.S.