Preheat conventional oven to 400°F. If you're using a convection oven, no need to preheat. Use middle rack.
Use a baking sheet (stainless steel cookie sheet preferably). Spread out 10-12 slices of bacon (or whatever can comfortably fit) directly onto the pan and bake for 16-20 minutes. For thin strips of bacon, check at 16 minutes. For thick strips you might want to do 22-25 minutes.
Immediately transfer bacon to a paper towel to absorb excess grease. Transfer the bacon grease in the pan to a bowl to use in future recipes!