So far I have managed to study for about 1 and half hours every week day except Friday. I am making good progress and have read about 1 third of the way through my textbooks.
My strategy is to read 6 pages of each of my textbooks every day. It takes about half an hour for me to read 6 pages because I often stop to think about what I have read or my mind starts wandering and I have to read the last few paragraphs again.
Last time I tried studying, which was a few years ago, I used to read a lot of pages at a time and only when I felt like it. That strategy of course did not work because I only finished a few chapters of each of my textbooks and I ended up failing most of the exams.