Revision before one day of exam & revising 3 subjects

I have 3 subjects to clear IPCC - Tax, Cost/fm and ITSM

I wantt o clear anyhow in may 2014 but i am not getting what to study in different method...i am doing the same old study

like clearing all concepts and practising max sums....

I want to complete this subjects preparimng till 20th may and i am done with 1/2 of each...

and how should and what should i study in one day before exam?

i mean what points i should keep in mind.....?

Please help..

i want to clear and i am feeling bit confused.....help please..

thank you