When writing your summary, follow this format:
Sentence 1: General summary. "In this lecture we learned..."
Sentence 2: More details. "Specifically..."
Sentence 3: Something you understood well. "I really understood..."
Sentence 4: Something you did not understand well. "I am still confused about..."
Sentence 5: Real life connections. "This lecture can be related to..."
Thanks to Ramsey Musallam for this format idea.

Here's an example based on a committee chairs lecture.
In this lecture we learned how powerful committee chairs can be. Specifically, if a committee chair wanted, she could kill a bill she didn't like.I really understood the way committee chairs are assigned. I am still confused as to how the minority party plays a role in the committee process. This lecture can be related to the way Dan Rostenkowski ran the Ways & Means Committee in the 1980s.