When my RLS is at it's worse (or if I catch it before then) I take a bath as hot as I can stand it and do leg stretches in the water. It almost always relieves my RLS. And when it doesn't it's usually because I stopped the bath too soon or the water wasn't hot enough... in which case I take another longer hotter bath and do more leg stretches. Works for my arm RLS too.
Even when I was on requip I would occasionally have to do the bath trick.