If you want an easy change to your routine, try 5+10:
Your regular 5 reps, then with no rest, 10 reps with about 50% max weight. Roughly enough to almost reach failure in 8-12 reps - you may need more or less depending on how hard you push yourself in your 5 reps.
Your regular 5 reps, then with no rest, 10 reps with about 50% max weight. Roughly enough to almost reach failure in 8-12 reps - you may need more or less depending on how hard you push yourself in your 5 reps.