Oh, sorry, Wolfgang. Oxford index cards are just plain white cards. I just write a question on one side and the answer on the other. Stuff like, "What 'bean things' can you NOT do in the ejbActive() or ejbPassivate() of an Entity bean?" When I review my stack of cards I just try to get the correct answer. If I get it right, I put the card on the 'answered' stack, if not, I put the card on the back of the 'not yet answered' pile. I keep going through the cards until I answer each one correctly. I just do this so that by the time I get to the end of the book I haven't forgotten what I learned at the beginning!
To answer Victor's question, I studied between 6 and 8 hours a day, not including the frequent breaks and exercise. I would have studied longer, but by the end of each day my brain was mush - I could hardly think at all. At the beginning of the day I would do a four hour session, then take a long walk or go work out, then do one to two hours of study, then take a short walk and if my brain was still working try another half hour to hour.