If you have an extremely good textbook with exercises: 1) Every weekday 30min uninterrupted study at a specific time, preferably in the morning. Don't miss, rain or shine. Take weekends off, though. 2) Work in a strict linear fashion: read a chapter, then solve all of that chapter's exercises in order without skipping any, and only then allow yourself to peek at the next chapter. Don't "take a first pass through the…
* Acknowledge that sometimes the book you're reading is repetitive or not very well written. If you're <10% in, read up on reviews and try to find a better book on the same subject. If ≥10%, commit and complete, acknowledging that you're not necessarily the best judge of a book's quality.