The truth is, I just enjoy watching people suffer.

 Building muscle requires you to push close to failure. The weight needs to be near a max for the given rep range and the reps need to be tough. Training should be hard.

 The good news is you do not need to crush yourself with 20 or 30 sets per workout; you can have a kickass workout set with 10 to 15 total sets IF you sprinkle in some dirty little tactics like the 20 rep set.

 I will use hip thrusts as an example since my morning clients twisted, angry faces are still fresh in my mind.

 Use a weight you can perform 8 to 12 reps with. If you can perform more than 12 reps, it is too light and if you cannot perform 8 reps, it is way to heavy. Perform 2 sets of 8 to 12 reps. On the 3^rd set you will again perform 8 to 12 reps, rest a few seconds and try to get a couple more reps, rest a few seconds and continue on until you have completed 20 reps.

 If you are using the right amount of weight, that 20^th rep should be pure hell. You will have pushed close to failure a few times on this set, which is a great way to build muscle. You will have performed a few stimulating reps in the first two sets as well.

 Following this delightful set, perform another 4 to 5 total sets of another exercise or two and you have a quality workout.

 Give these 20-rep sets a try and give me some feedback on your favorite exercises.