Here's what has worked best for me:
4-day split
Day 1 - Chest, traps, abs, cardio
Day 2 - rest
Day 3 - Delts, triceps, abs, cardio
Day 4 - Back, biceps, cardio
Day 5 - rest
Day 6 - Legs
Day 7 - rest; cardio outside of gym (walking in the park with my kids or something)
With this split, my delts and triceps don't even get slightly hit (via chest day) for 5 days and every bodypart gets directly hit every 7 days. There's no golden rule though with workout structure. Just make sure you don't overtrain or undereat, and make the most out of the short time frame in the gym each day that you can then get out and live life.