I start revising 2nd March up until 24th March to consolidate on all exam material. Then from 30th March - 11th April for subject specific work, for example I will revise and go over bits I still don't understand.
Monday 13th April is when I begin the vicious revision cycle all the way until Tuesday 16th June! It is going to be tough, tiring and will cause a few mental breakdowns along the way - but lets face it, it's 2 months of my life which will affect much more and will stay with me for my whole life. Plus I do have just under 3 months on holiday (mostly sleeping)!
I've got a timetable day to day of units to complete, but no time limits. This way I can stay focused on the revision and not worry about time. Plus chances are I wouldn't have followed timings anyway.