Air Fryer: Place a piece of bread at the bottom of the air fryer, under the grate. Lay the bacon, about 5 strips at a time, in the air fryer. It is okay if they overlap a bit. Air fry at 380F for 8 minutes with the shake reminder on, and flipping at the halfway point using a pair of tongs. Discard bread when finished cooking all of the bacon and it has cooled enough to handle.
Skillet: Preheat the cast iron skillet to 375F or medium-low heat. Place approximately 5 strips of bacon, cut in half if needed, into the skillet. Allow for a bit of spacing so the bacon doesn't stick to each other. Cook for 5 minutes on one side, undisturbed, and flip to cook on the other side for another 5 minutes. Use a mesh guard to reduce splatter.
Oven Method 1: Line a rimmed baking sheet with aluminum foil. Place the bacon strips on the foil and bake at 375F for 18 minutes. No need to flip.
Oven Method 2: Line a rimmed baking sheet with aluminum foil. Place a cookie rack on top of the foil to fit inside the baking sheet. Spray with non-stick spray. Place the bacon strips on the cookie rack and bake at 375F for 15 minutes and check for desired doneness. No need to flip.
Mircowave: Line a plate with about 4 paper towels to create a thick bedding for as much grease to be absorbed as possible. Add the slices of bacon, careful not to overlap. Microwave on high for 5-6 minutes, flipping half way through. Check the bacon for desired crispiness.
All Methods: Once bacon is finished cooking, be sure to move to a plate lined with paper towels to drain of excess grease.