One day an issue of APR came with Frank O'Hara's picture on it. O'Hara was one of my favorite poets. Inside was an article by Marjorie P. on FO'H. Later, when I was about to graduate from college, I went to the new book section of the library and found a book called Poetics of Indeterminacy. This was the book I wanted to have written. I wanted to write a book like that about Spanish and / or Latin American poetry. I didn't meet her until several years later but she was a formative influence.
In the first place, there is the canon. MP has legitimated the study of whole swaths of material, from O'Hara to Goldsmith. This has met with a lot of resistance. How dare she treat language poetry or John Cage as legitimate objects of academic study? Often, the argument is that she has been too successful in this enterprise. In other words, people complain that all the things she has studied are now too academic, forgetting that they weren't always such.
Secondly, a method or approach, consisting merely of writing clearly and forcefully, with attention to what the words on the page actually are. That gets you very far.