If there is tape knot one end (so you don't just pull it right out!) and gather. Even if they are tab top hang them up & gather on the pole. It looks nicer to have "full" curtains rather than measly looking ones. You could even get a couple of tie-backs to hold back neatly when open. Sometimes you have to let curtains hang a couple of days to get them hanging nicely. With tape top curtains I usually get ones that are at least 1 & a half times the width of the pole.