This is a bit off-topic but since you guys are bringing up "leg day" I really like this idea that has been gaining some momentum with the masses.
LEG DAY A
Quad emphasis (quads first, 3 exercises: isolation and 2 compounds. example: leg extensions, hack squats and leg press)
Hams (one isolation and one compound. example: seated leg curls, dumbbell RDL)
Calves (one seated, one standing)
LEG DAY B
Hamstring emphasis (hams first, 3 exercises: isolation and 2 compounds. example. lying leg curls, barbell RDL, dumbbell lunges)
Quads (one isolation and one compound. example: leg extensions and squats)
Calves (one standing, one angled such as donkey machine)
LEG DAY C
Calves emphasis (calves first. seated calves, standing calves, calf press on leg press)
Quads (one isolation and one compound. example: single leg extensions and some type of machine squat)
Hams (one isolation and one compound. example: single leg standing ham curls and rack RDL)