Meant to be eaten immediately. Crisping the bacon a day ahead makes a weekday version about 4 minutes' work. Assembled sandwiches can be wrapped and frozen a month — reheat from frozen at 350°F for 20 minutes.
Cover the pan for the last minute. The trapped steam sets the top of the white while the yolk stays liquid.
Too hot, too fast. Low and slow renders the fat out, and that rendering is what makes it crisp. Don't crowd the pan either.
Bake bacon on a sheet pan at 400°F for 15–18 minutes and cook eggs in a muffin tin at 350°F for 12. That scales to a dozen without standing at the stove.