A vital component of academic success in college math classes is attendance. Attend every single class during the semester. Math is a particularly important subject to maintain attendance, as its complexity and nature means it is very hard to catch up or advance in learning if a section has been missed or inadequately studied.
Sit in the front row of your classes, as this minimizes distractions and focuses you on the lecturer. Pay attention, take extensive notes and ask questions when you don't understand steps and processes within mathematical problems of equations. Sitting in the back of the classroom and texting or talking is not effective. If you've made the effort to get to class, maximize the effectiveness of your attendance.
Taking extensive notes helps in a number of areas. It helps you to pay attention and absorb the material being taught in class. And when it comes time to review, it helps to have your own explanations and understandings. When taking notes, it's better to have too many than too few notes. Make your notes accurate, neat and tidy. A missed decimal point or vague symbol can be important.
Keep up with course work throughout the year, as it's far harder to "wing" math than many other subjects due to its technical nature and high degrees of accuracy. Keep studying throughout the year, not just when there is a test or exam coming up. Develop good study habits and disciplined habits. A study buddy is a good strategy as you can help each solve math problems. Take regular study breaks, too, as math can be an particularly exhausting and mentally-consuming subject.