Sally Jupiter Costume (Silk Spectre I) from Watchmen

Step 7 Beginning Neck piece Sewing Strategy.

Sew along the top, all the way across.  Sew the bottom across, leaving a ~2 inch gap on either side of the center point, where the yellow fabric halter will hang from the neck piece. 

Make sure to sew a nice, sharp point on the bottom of the neck.

Trim the interfacing around your stitches and flip the neck piece right-side-out.  Take a pencil/pen/paint brush/other dull pointed object (I suggest the point on a paintbrush, the opposite end from the brush part) and push the point from the indie, making sure the fabric is not tucked inside, and everything is laying flat.  
After the point if pointed to your liking, press the neck piece with an iron and either set it aside or do as I did and  proceed to push holes through the locations where you want your eyelets and insert them.  If you choose to insert the eyelets now, you can lace the neckpiece and fasten the ends of the lacing to the back to secure them.  You only need enough lacing to go through all the loops in the lacing pattern you want, as the neck does not tie or or have a bow. (The lacing is for show on the neck and belt.)