Pyramid training is the best way of building strength and size, this method involves altering weights over a number of sets. First warm the muscle up with the lower weights and high reps, each set should get progressively heavier and the reps should reduce.
Aim to get the most form the set, take yourself to near failure and bring yourself back to starting reps. 
Pyramid training is great for increasing muscles strength and size, this method of training is not suited for beginners , but would focus more on people whom have been training for over six months and want to move to the next level. If beginner try using a resistance bands before weights, using different levels on each exercise is essential.
