How do I stay organized and on-top on my assignments in college?

Throughout high school I have mainly relied on my memory to remind me to do my homework. This senior year I finally purchased a planner and I am proud to call myself a planner person; however, I still find myself forgetting about it and not writing in it. Also, since I will be a D1 student athlete at Mississippi State it will be 10 times harder to keep myself organized and get all my assignments done. One idea that I read from USNews.com was to voice record your class lectures. This would be helpful when studying or doing homework, so you can listen how to do a problem while trying to figure it out on paper. For me, I learn by hearing and listening, so this would be a good way to really understanding what I am doing especially in math. Also the Huffington Post recommends to keep a regular routine because "Keeping to a regular routine and structure is very important in helping you avoid the pitfalls of procrastination and avoidance; which then leads to feeling overwhelmed and stressed out." Keeping a simple morning and night routine can save me time and keep me more relaxed. Also having a set soccer routine, I will have to set my time to work around the demanding schedule. Although I will be playing very competitive soccer through college, I know that I can still be organized and on top of my work with a little bit of focus and awareness of my daily routines and schedules.