Our imaginations go a bit haywire sometimes if we're not careful enough. However, we need to remember that, when harnessed, our imaginations are the most powerful tool available to the human race. Every progressive move in human history can be traced down to someone who dared to think differently, to let their imaginations wild on the subject of their choice.
Creativity is a gift that must not be abused or taken forgranted. Don't fall into the trap of just using your imagination to help you in your career, but reserve a bit of energy to plug into several different facets of your life - you'll be surprised at what you can achieve!