Sixth form and a levelWatch
Complete homework the day that you get it, so that it doesn't build up and become unbearable.
Have a fun club or activity you do so that you don't become too stressed by Sixth Form.
I recommend not picking all Essay subjects because it will get quite tiring and you get to a time where you have 5 essays due the next day.
Have a more chill and fun subject so that you can express your creative and imaginative side (Art? Drama? Photography? Media Studies?).
Try to figure out what you want to do so as a career so that you can do extra curricular activities to work towards that.