Pre-exhaustion is a fantastic training protocol for stimulating new muscle growth whilst giving you a challenging workout. It involves starting with a single joint exercise to fatigue the targeted muscle, followed by a multi joint exercise that hits the same muscle group, plus a few others. This will increase the overall training effect for that muscle group. There are plenty of combinations you can try that will keep your workouts fresh and exciting, but how about this for a pre-exhaustion triceps routine....
1A: Lying ez bar skull crushers
4 x 10-12 reps
1B: tricep dips
4 x 8-12