Here are my tips and a helpful video for Needleturn Applique
*Use a 10 -12 applique needle, a small fine needle will help to achieve a neat finish
*Use a silk thread such as YLI, this thread is very fine and will magically disappear as you applique
*Use a scant 1/8" seam allowance for each shape
*Choose good quality cotton fabric that is soft
*Applique each shape using a Blind Hemstitch
Take a few minutes to watch a video which reveals how to achieve perfect corners.