Save all exams and lab reports until the end of the semester. Except for the assignment on page A-10 in unit 4, homework is not collected or graded. However, it is extremely important that you do the homework. Exams are patterned after the homework. If you can do the homework, you can do the exams.
Homework is discussed in review sessions and during office hours.
You should do the assigned Practice Exercises as they come up in the reading. They are usually listed right after a worked out example. The idea is to try solving a problem right after having studied the solution to a similar problem. Homework problems in the textbook are located at the ends of the chapters. You should do the Minimum Homework first.