Sometimes in order to shock muscles into growth you must do things that are unconventional. Always remember that the more advanced you are in bodybuilding the harder it is to convince those muscles to grow. Thus, you need to get creative with your bodybuilding training routines.
So if for example you have been doing 3 sets of incline bench press for 6 reps, 3 sets of dips for 10 reps and 3 sets of incline flyes for 12 reps, once your routine stops to make your chest muscles sore, change it to something more shocking like: 10 sets of 10 reps of incline dumbbell press followed by 2 sets of 15 of cable flyes. Alternatively you can do 5 sets of 5 reps of incline dumbbell press followed by 2 sets of cable flyes for 15 reps.
Also, another technique that is shocking is to take a bodybuilding exercise and repeat it somewhere in the routine. For example, if you want to emphasize you rear delts, you can have a routine that starts with bent over laterals and that ends with bent over laterals. An example is:
Bent Over Laterals 3 sets of 8 reps
Dumbbell Shoulder Press 3 sets of 10, 8, 6 reps
Lateral Raises 3 sets of 10-12 reps
Bent Over Laterals 3 sets of 15 reps
If you notice, in the routine above, bent over laterals are repeated twice during the workout and performed for different repetition ranges.
You can also introduce several advanced training techniques like the ones listed in my Advanced Bodybuilding Training Techniques article. Also, do not ever forget to periodize your bodybuilding workouts accordingly as specified in my Advanced Bodybuilding Workout.
So do not be afraid of change. Change is the only constant in the universe so the faster you embrace that concept the better life will be for you and the faster your bodybuilding progress will be as well!