As happens at times, I was disappointed in how much the red disappeared into the background; I had hoped it would make more of a statement but that didn't happen. So, a couple of things -- I simply embellished a piece of red over a portion of the left area. The wool area showing through in the middle got some beads that ended up reminding me of a fancy flower stem which needed a flower. If you look closely, you can also see that I also added a piece of velvet, a flower with a leaf and some more stitching to define them and balance the other side. BUT you need to know, that it took a few days of me looking at it to see what it needed to be finished and trying things out and you'll have to do the same with your piece; if you do this exercise enough, your eye will become trained.
Try various approaches and different materials - embroidery, beads. You can always remove them or cover them up if they don't turn out the way you like. I could have done crazy stitching by hand with a heavier thread or embellished some yarn on top - there are all sorts of options once you get to this point.
I hope you have enjoyed this tutorial - let me know if you have questions and please send pictures so we can all see the various approaches and different colorways from all of you who chose to partake.