Well, based on experience, I do this. When I was reviewing for my board exam at work, I allot 3 hours a day, starts from 3 am to 6 in the morning, to review my notes. I have my notes ready by the weekend and I do review 3 hours a day. When I have time during the weekend, I will start reviewing during the weekend when I am happy. While reviewing, I have coffee and nuts besides me. The nuts stimulates the brain and the coffee will keep you awake. I also play music from orchestra or music from Mozart. I make it as a background music. Sometimes I play music from Beethoven. I try not to feel distracted and when I am studying, I keep everything seriously because I don't want to waste my time. I also make time for me to have a pop quiz. I make a pop quiz for myself to test what I reviewed.