I found that realy works for me when i am studying:
I wil read through everything if its study work like biology and then i will highlight the key words then being followed by memorising!
Then i will sum everything up depending on the volume !
If i study maths or physics i shal start a few weeks earlier and work throug examples and old papers .
Exercising is also very importend !!! and sleep!!!!!! and healthy eating!!!
Cheers!