Clear out a small room to use for your recording booth. A walk-in closet works well.
Measure the room's walls, ceiling, door and floor.
Cut sheets of the acoustic foam with the scissors, conforming to the measurements taken.
Using the hammer, nail the acoustic foam over each of the areas measured. When covering the door, nail the foam over the door's top, side and bottom to create a tight fit in the door frame when the door is closed.
Your recording booth is ready.