Like a few of the above posters, I really just get absolutely nowhere in terms of study during the holidays. Mainly reserved those for my two major works plus general relaxation to recharge after assessment and exam periods.
In terms of actual study-study though... I must say I'm a bit of a procrastinator. I still try and study somewhat consistently for a week or two before an exam, or longer depending on the amount of exams and how they are on the timetable, but I ramp it up the closer it gets. Sometimes one subject gets neglected over another though and I absolutely cram until 12am or 1am the night before, but *generally* I try and get the minimum 8 hours sleep so I'm refreshed, then get to school early and do a quick skim of notes in areas I'm not sure of.
Cramming seems to work better for me in the long-run though. I seem to remember things better in bursts than consistent yet divided study.