I tend to like cutting the volume in half every 3rd week.
So it's like this:
Week 1 normal volume
Week 2 normal volume
Week 3 half volume
week 4 normal volume
week 5 normal volume
week 6 half volume
The cutting the volume in half while maintaining intensity helps make gains since your body isn't just trying to recover from the workouts.
Depending on how advanced you are, you might want to change workouts every 2-4 weeks. And by changing I mean using a different grip or stance. For example, if you do chins switch to pullups, squats switch to a wider stance, etc. This will keep you doing the same basic lifts but switching it up enough to keep you progressing and challenging the muscles.