Here's how:
create mind-maps or webs to map out how ideas or parts of things are related or connected
try using a flowchart to show a process or how information is structured
this can also be an effective way of taking notes while watching a video (see also Video Notes)
this might also be a great way to take the notes you've already generated in other formats and arrange them so that you can see connections and contrasts
Here are some examles: