You will need a few tools and a bit of material.
Tools & Material
Drywall cutting blade
Drywall taping knife
Screwdriver or Drill
Tape or Fibafuse
Wood for backing
This hole was cause during the drywall delivery .
As you can see in the picture on the right it is too big of a hole to be covered by a piece of tape .
Measure the size of the hole.
Cut the hole in a square or rectangular shape.
Add backing to each side of the hole.
Screw it in place in the drywall.
Cut a drywall piece 1/4 inch smaller than your hole.
Screw it to the backing .
Embed paper tape or Fibafuse over the seams.
In this example I use a 6 inch Fibafuse and only had to use a single piece.
Remove all the excess of compound swipe it clean and neat .
Let it dry .
Using a trowel or taping knife add a thin coat of drywall compound.
Let it dry.
Sand edges with a block sander and repeat Step 8.
Sand your final skim coat with a sanding sponge with a very fine grit.
Et voila ! It should be ready to prime.