I just read about an interesting method to actually overcome plateaus fairly quick. It involves purposely cheating on part of the reps you do.
For example, using cheating to your advantage one would jump up to the bar in order to skip the concentric and then do the eccentric just like normal. Same goes, for example for an overhead press. Slighty go down with your legs (maybe like a fourth or less of a squat motion) and then explosively get up using that momentum to get the weight over your head. Eccentric like normal.
As far as I know, the eccentric can be up to 40% more effective than the concentric when it comes to hypertrophy and muscle growth (saw that in a study, unfortunately I can't find it at the moment to link it). So this might actually really help overcoming a plateau, I think.
Looking at the negative aspects of this method, I was always taught that cheating in an exercise will result in injuries. How can I effectively, if possible, implement such a method without injuring myself?