1. Color-code Items.
When you associate a certain color with a specific subject, you're able to think less about where specific items belong. Get a different colored binder for each subject you have in school. For example, the yellow binder might be for your math class and the green binder would be used for your science class. Purchase a few colored, fine-point Sharpie pens and use the colored pen for that class. As you write notes, put away papers and operate in a specific class, you're less likely to get it confused with another subject because you have the subjects color-coded.
2. Use a Planner.
A student planner is a strong organizational tool that should accompany you every day. In each class, the teacher will more than likely have homework, reading assignments and other research for you to complete on your own. You don't want to forget any of your assigned tasks. Make sure you intentionally write down everything that's expected of you. If you have a question or need clarification, make sure you get an answer because you wouldn't want this interfering with your overall class performance and your final grade. Outside of your classes, you might be involved in extra-curricular activities like sports or volunteer organizations. Feel free to write down all of those commitments so that you don't accidentally forget to attend.
3. Use Storage Supplies.
Wicker baskets, pencil pouches and other storage items are great to have on hand for all of your schoolwork. It's also wise to work in one space at home. Designate a specific area in the house as your study area. In this area, you can store your writing utensils, a monthly calendar and a dry erase board. Keep your books stored on a bookshelf. Include supplemental resource books like a dictionary and a thesaurus. To keep things organized, everything needs to have a home. If you don't have anywhere to place it, it probably doesn't belong and needs to go in the trash. When every item has an assigned home, you'll have an easier time maintaining organization.
4. Prep the Night Before.
The night before school, make sure you lay out your clothes, pack your lunch and look at your schedule for the next day. If you need to do laundry, get it done ahead of time so you're not looking for an item in the morning that's actually in the hamper. Look at the weather forecast to know what to expect. If you need to pack an umbrella, pull it out the night before. Pull out your planner and do an overview of everything you'll need to do the following day. Mentally plan out your day and this will help you remain informed and focused.
Once you develop a system for maintaining organization, you'll be in a much better position to excel in school. Getting used to the system may take some time, but don't give up. The rewards are worth the effort of the adjustment period.