I hate slippery rulers too, My first suggestion is to cut small squares of fine grit sandpaper and glue them to the underside of the ruler. (You'll only need four), Sandpaper circles with good adhesive can also be purchased, although they might be difficult to find in quilting magazines, etc. What I LOVE are small plastic circles which don't block your vision, i.e., you can see right through them and you don't lose the line you're trying to follow. These are harder to find, and I don't remember where I got mine, but if you can find them I think you'll love them too.