If it cheers you up, my mate (5 50+ scores) used facebook more than me during VCE 
:O really? in that case....
if ya actually think about it the internet as a whole is the actual distraction. like if i didnt go on facebook, id probably end up on another site 24/7 - like this one
so meh, ill just keep my VN and fb but only until my scores become shockingly bad 
rohitpi, yea, i looked through my 3/4 txtbk. pretty similar stuff to cell construction + transportation and stuff.
so thats a good thing i guess 
i was talking about the explaining stuff to me in general. trust me, my biol teacher this yr isnt really good 
For bio, I also did the end of unit TSFX lectures, their notes were pretty good and the speaker (Mr Mac) was excellent and really intelligent.
The most important thing about summer holidays study (just to emphasise), is do not overwork yourself! Some kids I know finished the course in several subjects and were really tired (and a bit arrogant) coming onto exam period. Important not to make that mistake, especially with a 3+4. Also, summer hols are holidays, and fun and socialising is really important too to keep fresh for the new year.
My attitude to tutoring is that 'only if you need it'. As I go to MHS, I know at least 90% of the students in my cohort do tutoring for all subjects, personally, I think this is a waste of time and money (no offence to the tutors out there). I would only use the services if there is genuine struggle with a concept or subject (and a dud teacher at school). The 99.95 person discussed before only did english tutoring in yr 12 (that's it).
Notes, definitely hand written. Typing can be a pain )time-wise) and can lead to distractions (fb, games, MSN, even VN!). I never made notes for maths though, feeling that there is no point in regurgitating the textbook's already concise theory.
Internet, 1-2 hours a day on week days (before exams that is

) is fine for me and enough time to spend on MSN or check cricinfo, etc.
Those are my methods, and I have used them since yr 7 (UHS gave us too much homework -I needed a regime like this) and have worked pretty well
so far! Good luck (again) and remember study+leisure+enough sleep!
(remember that I havn't finished VCE yet as well, and take advice from some of the furniture from this forum -just as I continuously do)