Preparing the ground for a swing set is easy if you have the right tools. You need to mow the yard in the area where the swing set will be placed. Make sure you place the swing set on a flat piece of ground so it does not tip over. Dig small holes in the ground so you can place the anchors that will go in the legs of the swing set. Put one anchor in each leg of the swing set and then put the leg in the hole that has been dug. If you cannot get the anchors in the swing set legs, call a professional to come help place the swing set.