Select a consistent place to study.
Some people need total quiet while others can study well with music in the background (try classical music). The key is to find a comfortable place and study there regularly, such as the kitchen table, a desk, a favorite chair, bed, etc. Make sure it has adequate lighting and keep all your study supplies in reach.
Dedicate a space for every class in your book bag.
In the department store aisles, there are boxes and boxes of binders, folders and organizational tools. For every class, dedicate a binder, folder or notebook. There should be a place for class notes, handouts and homework assignments. Some of the larger binders can accommodate all classes. It is really a matter of personal choice; just keep papers separated by class.
Stay organized throughout the year.
Most students have many binders and folders, but they do not use them. Many stuff every single paper from school into one binder. Half of their papers become misplaced or lost. Do not use the “shove” method when papers are returned, i.e. shove everything in one binder. Place them in the correct folder. If you are using a three-ring binder to keep papers organized, take the time to open the metal prongs and place them securely in it. If someone helps you organize your papers, take the time to continue putting everything in its place.