Measure the ornament's height and add 12 inches. Cut rebar or a wood stake to this measurement; it will serve as a support. Use a saw to cut the wood. Use bolt cutters, a hydraulic bolt cutter or a skill saw with a masonry blade to cut rebar. According to Garden Blog website, cut halfway through rebar. Step on the rebar while pulling one end toward you. The rebar will snap.
Center the support on the back of the ornament so that the extra 12 inches extend beyond its bottom.
Tape the stake to the ornament's back with duct tape.
Drill a hole through the ornament 3 inches from the bottom edge and 1 inch to the left of the support. Drill a hole 3 inches from the bottom edge and 1 inch to the right of the support.
Measure 3 inches down from the support top. Drill a hole 1 inch to the left of the support. Drill a hole 1 inch to the right of the support. These holes will allow the cable ties to connect the ornament to the support.
Insert a cable tie through the bottom left hole so that the buckle is at the back. Feed the tie around the front and through the hole to the right of the support. Slide the tie end into the buckle. Pull the tie tight. Repeat for the top holes.
Hammer the leftover 12 inches of the stake into the ground until the ornament is at the height you prefer.
Position the ornament within reach of an outlet if necessary. Locate the anchor rings, straps or loops at the ornament's base.
Stretch the straps or loops in a direction away from the ornament. Alternatively, tie rope in a knot through the metal or sewn ring. Stretch the rope away from the ornament.
Tie or secure the straps, loops or rope to metal stakes. Some inflatable ornaments feature rings through which metal stakes are inserted and then hammered into the ground. Some stakes feature a hoop or triangle that you feed ropes or ties through.
Hammer the stakes into the ground.
Insert a dowel into the back or through the base of the ornament. For example, slide the dowel behind a scarecrow's shirt into its back, or up into the bottom of a fabric snowman. The dowel should penetrate at least 3 inches into the ornament and extend below the ornament by about 6 inches.
Feel for the dowel top through the ornament. Push or hammer the dowel into the ground or into bales of hay or other displays.
Tie twine around an inconspicuous place on the ornament and secure the twine to a stake. Insert the stake into the ground behind or near the ornament if the ornament is light enough to be blown from the dowel.
Position the ornament over the ground.
Find a flat surface on the ornament's stake to focus the hammer's impact upon. Grip the ornament firmly.
Hammer the ornament into the ground. If the ground is soft, you may be able to twist the stake in without hammering.