Do you have any good tips/techniques (or recommended resources) for taking better notes, especially when in a live lecture or class, so that you can better absorb the material?
Not really sure. Different things work for different people. The key is to filter the unnecessary from the necessary (i.e. that which is directly relevant to the talk/lecture at hand from that which is not).
Then, to type up and restructure your notes when you get home according to the way you understand things. This is important. In doing so you are solidifying the lesson in your long-term memory.
And Allah knows best.