hey, welcome to the forums!
with notes, i found that the more aesthetically pleasing they were, the more i was going to read them. i assume you already have half done notes, so start by making them look super pretty, e.g. special fonts for titles, different colours for syllabus points and sub-points and making everything neat. it's also really satisfying once you've made your notes look nice. i always had my syllabus points in red, and anything that went under it was usually in dot points, so it was easier to read.
also, different subjects may mean different layouts. for hsie subjects, i liked the basic syllabus point, dot point format which was straightforward and once i knew the syllabus better, it was easier to find stuff when doing past papers. for english, tables are amazing. for maths, palm cards are the best - separate them into different topics, and write down the stuff you can't remember/aren't on the formula sheet. however, what works for me, mightn't work for you, so use your time this holidays to figure out how you like your notes. :-)
keeping up with your notes is another important thing. updating them everyday is ideal, but weekly is good too. after you've finished the school day, you can come home and write notes for whatever you've learnt in class. study periods are another awesome thing to use, and because notes don't require as much concentration (i think??), do your notes in your studies!
hope this helps :-)