You can use a bookshelf to store three-ring binders, work-related books, blank CD-ROMs, reams of paper, and other additional office supplies. Find a bookshelf that will meet your long-term needs. Sometimes 2 shelves will be sufficient; other times you may need something larger. In my personal office, I have a 4-shelf system that is raised off the floor. This allows me a space to store items underneath (I keep some archived files in 2 boxes under there). If your office space is limited, I recommend finding a tall, narrow bookshelf over a wide one. This will allow you the maximum storage area without making your office seem crowded.