Use free periods to do actual work, and find the right balance between finishing homework and revising. That being said, not everyone studies the same way so if you’re someone who needs to space everything out and consolidate every day then focus on that, if you’re like me and get everything done by doing stuff last minute/in random bursts of motivation, and don’t find writing notes months in advance useful at all, then you do you. At the end of the day, if you’re getting good grades, that’s what matters. obviously don’t be extreme and cram an entire subject the day before an exam, but don’t beat yourself up if your methods of studying don’t match up to other people.
I would definitely recommend spacing out your extra reading for UCAS throughout the year tho. I was stressed out because I didn’t have time to read loads of books around my chosen subject, but you really don’t have to do that. Instead, spend a few minutes here and here watching a talk on YouTube or a documentary, doing a short course from the Open University, and reading articles. Lots of free zoom talks are happening at the moment so have a look on Eventbrite. Buy a notebook and make detailed notes on everything you do from the start. By the time you come to your personal statement it will basically write itself.
If you want to do something like an EPQ or another extra qualification, remember that it’s a big commitment. I could go on about how time consuming the EPQ was, but just remember to take into account how you would fit something like that around your A Levels.
If you have an existential crisis about your uni course and decide to change your mind completely (like I did), don’t stress too much about it. As long as you have enough evidence in your PS that you are passionate about the subject, you will be fine. Make sure you explore all options and keep an open mind, because it’s a really important decision, and I would have been stuck with a course that is totally not right for me otherwise.
I also agree with people who said that you should make friends with as many people as possible and spend time with them rather than just working 24/7. However, if you feel like you aren’t really making any close friends or you don’t really fit in, don’t stress too much about it. These two years will go past VERY quickly, and whether you go on to uni or do something else, you will have so many more opportunities to find “your people” and chances are that you will only keep in contact with a handful of friends from college. Prioritise your wellbeing - it’s easy to say but it’s really not worth sacrificing your happiness for your grades.