Brainmelt love that look!
Drink of water I'm with you on the all -consuming wait for A level results.
DD completed most of the holiday prep in the first week - I suggested it would be a good idea to get it done early and she actually listened! 
I think she still has some reading to do for psychology and some vocab to go over for French, but Chemistry is definitely all done.
She had some for each subject, given during the taster lessons on induction day.
Apparently one of the teachers hinted that if a subject required grade was slightly missed, and it came down to head of department deciding whether to still accept for that subject or not, they would look more favourably at dc if homework was completed as it shows the desired attitude for 6th form.