I didn't set myself a fixed number of hours a day as I had full time job and children. Had things to learn written on cards so even walking between offices at work was also studying. Had subjects on tapes I made myself to listen to in the car. (of course the children learnt quicker than me!)Also had GPWS data stuck to fish tank to study when washing up etc. Books dragged out whenever - and it was sometimes midnight. Tough times but can be done, and a short brush up course gave me practice and the all important questions. Hope it goes well for you too.