What and Why
Taking and organizing notes is essential and personal. It is essential so you don't forget your own ideas, and so you remember who came up with the ideas that were not yours. There are different styles and methods. Here are a few that you can try.
There are some new technologies out there that might help with note-taking and organizing. They are new, which is to say, they can be buggy or limited, but in combination, they can be very helpful. Experiment with them, but don't necessarily depend on them.