You need to experiment & find what works for you, adapt the techniques you try to suit your way of learning.
The main ways of taking notes
Mind Maps
Cornell Notes
Linear Notes
A fascinating look at how one student approaches learning
Mind Maps
Linear Notes
< Example from Warwick.ac.uk
Cornell Notes
I use the printed margin to record page numbers & key words.
At the top of the page are any reference details.
I use colour and abbreviations/ symbols throughout to be more concise and speed up the writing.
Free online course: here
Further Resources: here