I took a creative stitching course sometime ago and I learned a nice technique to add dimension to elements in rug hooking.
I decided to rehook the daisy and add a 3D effect.
First you outline the area using wool yarn and work the next row(loop) higher and each subsequent row, higher than the last.
Once you have finished filling it with loops, it should look something like this depending on the shape of your element.
Take a small, sharp pair of scissors and cut each loop. Yes, cut each loop apart and trust me, it doesn't fall apart.
Then, you can use fingers to fluff up the yarn. Once your wool yarn is fluffy, you can shape the element with scissors. And there you have it.