Had to laugh.... such a variety of ideas. I have the same problem with my 6600, but the permanent solutions made me laugh. The floor in my quilting room is painted wood, rather slippery, and not mine to change. BUT I use fold down/up tables and may use only two if it is a small project, or 4 (and the ping pong table if it is large. That means where my foot pedal is for any project moves around, so no "permanent" solution is possible.
Right now my DH is helping me quilt a 7x8' landscape quilt with a lot of appliques on it and I have tables behind, beside and in front of me to hold the "roll" while I sew down and applique. The tables are fairly high so I am standing while sewing which helps keep the pedal where is belongs.