Jennifer, I've found the easiest and laziest way to make a new bed is to just take bags of topsoil and in late Summer or Fall lay them out - at least 2 bags deep where you want and whatever shape you want -. You want to leave the soil in the bags. No need to dig or remove grass. Come Spring all you have to do is remove the soil from the bags by taking a carpet knife, cutting the bags and pulling out the plastic and voila! You have a nice new weed free bed ready for planting.