Your foot pedals misbehavin'? Make 'em go stand in the corner!
If you don't have a corner, just build one. That's what callen did. Rocks?, bricks?, books? anything!
I use a pillow in my sewing room. It is a fairly large pillow, but one that is not too tightly stuffed. (This might be what to do with all those fabric scraps in your wastebasket. Sew up some trash fabric into a pillow case and stuff it.) Make a "dent" in the pillow to accommodate the pedal, push this against the back wall and a table leg or box, and the pedal's not going anywhere.
In my living room I sew at a "gate leg table", the kind with a gazillion legs under it. I found a piece of heavy rug stabilizer and stretched a long narrow piece under two of the legs. It acts like a sling. My pedal sits half on the floor and the half on the stabilizer. I put the pedal just to the right of a leg so I can use my toe to find the leg, press down and there is the power.