I've sat down and written every advanced principle I have used to get myself bigger and blast through times where I've felt stuck
What you should know first (you probably don't need this)
Unless your nutrition, stress, health, and recovery are good, you are just going to make things worse. So if that's you, go check out how we think you should fix your heatlh.
Second, if your technique sucks or you have no 'mind-muscle' connection, these principles aren't going to help. Go back and try...