In the 30:5:1 Reduce the Key Words technique you identify a topic and then write down 30 key words. You they decide which are the top 5 key words from the original 30, and then, finally, from the 5 key words, the one key word for the topic.
This technique will help you to review a lesson earlier in the day, prepare for a forthcoming lesson, or revise a topic for an exam. You can also use your lists to refer back to on the night before an exam.
We know that constantly summarising / refining information is one of the best ways to revise.
You can download the template here.