Its fine just do whatever works for you. Honestly if you just do questions, as long as you don't take massive one month breaks where you forget the smallest details then you should be fine.
It might be a good idea to write down notes though of stuff that is very vague and you might not remember after a while.
I used to base all my work off writing notes and then by HSC I did not even look at them once in the one month lead up.
Honestly, because I was so used to writing notes, I found it hard to adjust to the times of uni because note writing is a long process and when you don't have as much time now as you did back in HSC its harder.
Also, when you are doing stuff like engineering or science, the notes are useless. The best thing is to just practice heaps and heaps of questions after you have learnt the theory. (probably not applicable to you now but might be in future).