WARNING SIGN 1: YOU FIND YOUR ART TOPIC BORING
Even the most dull and uninspiring subject-matter can be turned into something wondrous. Boredom is a mindset. If your teacher has slammed something unappealing onto the table (engine parts, glass bottles or any other great Art teacher staple), your challenge is to find a way to make these matter. Take a deep breath and look for parallels between what you see and the stuff of your life. Corroded steel joints can echo a faded and broken relationship; light dancing on glass can represent layered memories or dreams. Tell yourself a story. Look for ways to introduce exciting mark-making, techniques and mediums. Take the shapes, lines and colours of your subject and use these as a vehicle to explore something personal and meaningful.
Note: Producing great work is just as difficult given a narrow topic as a wide one. Whether you succeed depends upon how well you respond to the task you have been given.