I've never had a tutor.
My summer holiday before Year 12 was actually a Winter continuation of school, as I spent it on exchange in Japan. One would think this would entail study, but I spent a large amount of that time sleeping in class trying to teach English. I finished some of my holiday homework in the three days between arriving home and going back to school. I read two of the four texts we were studying whilst over there, though had already read 1984, but that meant I didn't touch Secret River until we got to it in the year. I also did Physics questions in class, as well as attempting (laughably) their Maths homework.
In terms of finishing courses, that concept didn't really exist for me. In fact, that's not quite true, as my Methods class was our accelerated maths class since year 9, and it is tailored to effectively do 3/4 Methods in Year 11 (as 1/2), so had more or less finished that course save normal distributions.
In terms of weekly schedules, I had a decided lack of them, not necessarily intentionally. I would usually have sport after school on Mondays and Wednesdays, and Uni Maths Tuesdays, so already was getting home late which didn't put me in an excellent mood for study. Many nights I would bring no books home, and even if I did I mightn't touch them. Coming up to SACs I tended to get serious, from at least the weekend before doing as much revision material as possible.
After I'm not sure how long, I decided it was finally the year to do the exercises set in maths (well Spesh at least) and did every question in the book as we went through it, which wasted a satisfying amount of pages.
In the period leading up to exams, I arguably got serious, though not until after trial exams, but many other things were going on for me. I wrote probably 9 or so English essays in a couple of days about a week out, and did at least 15-20 trials for calc and non-calc Methods and Spesh. Physics was next which I did slightly less but still a few trials for, and then was almost burnt-out but not quite for Japanese. I then dusted off the Uni Maths books (quite literally as I hadn't touched them for a good two months) and went at that hard to round out the year).
Not at all sure what to draw from this, but just anything is possible with a bit of luck, and enjoy the year.
My best motivational tip is to get a whiteboard, and write things on it. Satisfying when they can be rubbed out.