The YouTube Channel for Riley Blake Designs just uploaded a really great video. It shows 7 projects with fabric circles, how to make half circle scallops for quilt edges, several applique tips, etc.
In this video, plastic circle rulers/templates are used but you can use other circles like plates or use the Olfa circle cutter that cuts many different sizes of circles.
APPLIQUE TIPS:TIP #1 (3:10) - Sew non-fusible interfacing to the pretty side of the fabric all the way around, (5:10) cut a slit through the interfacing, turn the circle right side out, gently push out the seams to make a perfect circle, press, then machine or hand applique.
TIP #2 (4:09) - Trim circles using pinking shears so that the edges curve easier.
TIP #3 (5:00) - For small blocks, if you don't have enough interfacing, use a dryer sheet! I would have never thought of that!
TIP #4 (11:33)- For turn applique, use a cardboard template 1/4"+ smaller than your cut shape, spray starch your fabric, iron your fabric around the template, let cool, then pop the cardboard out. Fabric piece is ready to machine or hand applique.
TIP #5 (15:53 & 19:35) - Cut out the bottom layer behind the appliqued piece and use that fabric for another project.
TIP #6 (17:27) - How to cut our circles with your rotary cutter! I've never seen this before.
THESE TIPS CAN BE USED FOR OTHER SHAPES AS WELL!