Let's be clear, I wasn't a good student. Keep that in mind with this advice :-)

This technique seems incredibly effective, but also way too time consuming. My best advice is to buy a ton of four color pens, and put them everywhere. Being able to use color to increase information density when both taking notes and re-writing notes was incredibly helpful (especially when drawing complex charts in economics).

There were people who had eight color pens, but those seemed a bridge too far. I honestly don't think I would have graduated without these (no affiliate): http://www.amazon.com/dp/B000F2PFPS

And who can take notes into an app? I need the freedom of pen and paper for doodling when class is boring :-)

If you want to go further:

https://en.wikipedia.org/wiki/How_to_Read_a_Book

Sorry, but I found this book to be excessively verbose, and lacking anything but basic reading strategies that I have no doubt most people who read heavily already follow.

The only useful tip I remember from the book is to scan a new book's index and bibliography first, to have a quick idea of what the book is about before you decide to read it.

In 9th grade our teacher had us make Cornell notes on everything we read (to be turned in).

All I remember is having to make the notes (because they took forever) but nothing of the content.

Honestly it just felt like more busy work that attributed to an ineffectual high school education.