I got a couple of bass exercise books for Christmas ("Bass Fitness" by Josquin Des Pres and "Daily Warm Up Exercises for Bass Guitar" by Steven Mooney). I'm not new to the instrument but my approach to formal practice has been... inconsistent at best. Trying to get more disciplined in the new year. The books have some interesting exercises but I'm kind of at a loss on how to use them in a practice routine. What's your approach... do you start at the beginning of the book and learn the first one until you know it in all keys, then move on to the second? Or do you flip through the book and pick one at random? How many days/weeks/months do you spend on each exercise? What percentage of your practice time do you spend on exercises? Also, if you know any other killer exercise books I should add to my collection, let me know!