Hmm, I had a tutor for Englang like from August onwards when I was having enormous trouble trying to self-teach the course (teacher's lessons weren't very good, and it wasn't helped by the fact that our class was very disruptive!). Helped heaps because I have someone who knows his stuff with whom I could discuss my ideas and theories with.
Chem, never had a tutor, but I did learn ahead (had to, Olympiad and that) but my teacher at Year 11 was amazing, and I think that's what helped me the most.
Physics, never had a tutor - teacher wasn't great, selftaught most of the course and repeatedly sought help from one of the other physics teachers (our physics department was AWESOME

)
Spesh/Methods: never had tutors for these, but I did kumon when I was younger, and that helped heaps
German: had a tutor for that, he helped a fair bit in that I could simply practise my german
Bio: parents forced me to grab a tutor for this, he had excellent resources, teaching wasn't great - I couldn't understand his accent!
So all in all, I guess I had some help along the way...