Know your GPA. You can obtain it from the registrar's office or calculate it yourself. Calculate your GPA by dividing the number of credit hours by the number of points you earned for each hour. For example, an "A" is worth four points per hour, a "B" is worth three points and so on. Remember to include only classes within your major. Once you have this information, set a goal for your GPA that you can reach.
Talk to your advisor. She can give you tips and insight into better ways to prepare for your classes, and steer you toward recommended tutors if needed.
Get involved in a study group within your major. The same group of students tend to stick together through multiple subjects within a major. This group can help you find alternate ways to learn, and provide moral support when needed.
Repeat a course, within your major, in which you did poorly. If you retake it and score well, then the new grade replaces the old one. This helps by removing the bad grade from your GPA calculation and replacing it with a good grade.