My daughter has a small room. We bought her a loft bed to help maximize space and over the years have tried various storage solutions, most of which were too bulky for her room. Finally I hit on the full wall shelf idea and it worked like a charm! Here are some before and after shots :
Using a level, a cordless electric drill, and drywall screws, we put up the shelving brackets. Because we had screws for drywall we did not need to worry about finding the studs. These shelves will not have really heavy things on them.