The Number of days you can consistently work out should decide how you split up your workouts.
2 or 3 days to workout
Do Full Body Workouts each day you work out. Include a squat, deadlift, a pull and a press
4 days to workout
Alternate upper body and lower body days
On Upper body days include at least 1 press, 1 horizontal pull, 1 vertical pull and some isolation for biceps and triceps.
Your lower body day should include a squats, a deadlift, some unilateral work for quads and hamstrings and calves
I day for pushing, 1 day for pulling, 2 leg days and 1 combination upper body day with pushing and pulling. Push days include chest press, shoulder press, dips. Pull days include horizontal and vertical pulls
2 leg days, 2 push days and 2 pull days. Alternate 1 leg day, 1 pull day, 1 push day and then repeat.