As you cover new material, you must constantly review old material, relating the new to the old in order to get the big picture. Listen to the lecture and participate in class activities. After class, review your notes and the appropriate sections of the text, and then do the assigned homework. Even though you may have thought you understood the material during the lecture, you will find that working problems on your own is a whole different proposition, requiring a higher level of understanding. Always check homework answers when possible.
Most texts provide answers to selected problems.
If you got some wrong answers or need more practice, review your notes and the text and then work additional problems until you are confident with the material. If you are having trouble, get help immediately. Do not fall behind. Now that you think you understand the current material, sit back and think about it. Relate the material to previous material covered in the course.