Are you taking a long time to find what you are looking for or is your mom always bugging you to clean your messy room?
Make sure you clean up your study table every time you are done working. Put things back where they belong and sort through the piles of stuff on your desk before going to sleep.
Bring your plate to the kitchen after meals. Clear the table and replace the kitchen floor mat with a cleaner one.
Put your books back in their proper place at the library or at the book store.