There are many different ways to take notes. You need to find an approach that works for you.
However, whatever method you use, your notes should always include:
- description - summary of the selected section (in your own words)
- analysis - what the text means
- evaluation - why it matters
You may also wish to add:
- other sources linked to the idea/argument etc
- comments and/or questions you have to help you develop your research
AND...
Always, always include the bibliographic details.
Here are two variations note-taking templates (based on Cornell), that you can use or adapt to suit.
Reading & note-taking template 1 
Reading & note-taking template 2
Hopkins, D. and Reid, T., 2018. The Academic Skills Handbook: Your Guide to Success in Writing, Thinking and Communicating at University. Sage.
Responses
That's really helpful.
Thanks.