My message to you over summer is to WRITE IT ALL DOWN!
If you've started to listen to podcasts, read new texts and articles and analyse new questions, then you're already ahead of the game!
Yet, however clever you are, no one can remember everything, so as you go about extending your learning this summer, my advice would be to write notes. These don't need to be super neat or organised but choose a place to store them (I put all of mine in a folder). When you come to writing your personal statement, I promise you'll be so happy you've got all of these pieces of paper as points of reference and inspiration!
* Jot down thoughts, ideas, problems as you go along.
* Store them together somewhere.
* Be sure to revisit these notes when drafting your personal statement!