Pan-frying is the standard way to cook bacon, but it has drawbacks. Only a few strips fit flat in most skillets—any more than that will slope up the sides, cooking unevenly. And bacon strips can shrink more than they need to in a hot pan. (Starting them in a cold pan helps, but you'll still need to flip often.)
Take a cue from chefs—bake your bacon. Heat hits from all sides, cooking more evenly. The result: consistently flat strips.
Line a jelly-roll pan with aluminum foil or parchment paper to make cleanup easier. Set a wire rack on the pans so the bacon doesn't sit in fat. Place bacon slices in a single layer on the rack, and bake at 400º for about 20 minutes (depending on bacon thickness and how crispy you like it).
Unless your oven has major hot spots, you don't have to flip the bacon or turn the pans. You can even put the bacon in while the oven preheats—the gradual temperature increase will render the fat more slowly and won't shrink the meat as much.