I'll leave this to other users to answer, by providing their tips on how they write their notes.
BUT I will be writing up the second edition to my study guide in November. Once my HSC is completed, I'll be writing it up and posting it. And in it, will be a dedicated section on writing notes. So, yeah, sorry for not having the time to go into it now, but as a 2015-er, look out for the second edition in November, where there will be some tips on writing notes from me.
Good luck in the meantime!