I did about an hour yesterday but today I kind of kicked myself into gear and did some more i'm going to try and do about 4 hours/day (but I doubt i'll keep it up!) It depends how well you know the subject material already and that relates to how early revision starts...
I need to LEARN a lot of material let alone revise it. This holiday should hopefully help me shift a lot of work
Same I have to learn pretty much all my economics, geography and english (i have read nowhere NEAR enough novels/ poems/ plays). At this rate, the only thing I'll be passing is math!