There's an idea repeated in Revelation that is probably excellent for 
memorizing the book.  Present, Past, and Future.  It's is written various 
ways, like 'what is, what was, and what is to come'.

Given the 'when' this book was written, the first 5 chapters are the 
present, chapter  12 is the past, and chapters 6 through 11, and chapters 
13 through 22 are the future divided into a part 1 and part 2 by chapter 
12.  By practice, I'm only working towards what I can do as I think the 
mind has limitless storage, and verse 3 of chapter 1 said to do it anyway, 
so why not?  

The prophetic books in the Bible are really fun, their time 
is completely different.  When I look at Jesus saying the hour will come 
and even now is for something days later, it's fun.  It's a different 
processing of time.  

Revelation is the same sort of style... it starts with churches that are 
present at the time, then one church it's told ten days of testing, and 
the Book of Martyrs we see those ten days of testing were ten different 
leaderships where Christians in that church were suffering which is not 
fun, yet the time processing is fun.