And you have to work them in a grid pattern rather than starting in the middle and concentrating on one symbol. I've also begun what is for me a new technique called "parking;" this involves halting your stitching and leaving the floss intact in the corner of the next stitch the floss is required for; as you can see below.
This is only the first page of the pattern. All of the shaded parts are the parts I've already finished. Yikes! Two pages after this.