The area of review in the thought of Rav Nahman of Uman and Breslov is ambiguous. We know exactly how he held one ought to learn as in saying the words and going on. But that is the "Bekiut" aspect of learning. The fast learning. But what about "Iyun". He clearly held from its importance as you can see in the LeM volume I chapter 78.  

One suggestion I have and I have tried  a few times myself is that once you get to the end of the book [whether Gemara or midrash or the natural sciences] to go back page by page from the end towards the beginning. This has the advantage that you are doing review before you have had a chance to start forgetting. And forgetting is almost inevitable if you go right back to the beginning once you have gotten to the end. But in this way of review page by page from the end towards the start --that way you are doing review with a short time from when you first learned the material.