Being unique sounds easy, but it can be harder to implement in the real world than you think. We all like to think that our business is the only one of it's kind. Truth is it probably isn't.
So how do you become unique? First thing is not to promote what everyone else is. For example. "We offer great service". Yeah so what your competitors are saying that too.
How about offering a guarantee to stand out. If you are a personal trainer or a gym you could say. "We guarantee you will meet your fitness or weight loss goals or we will refund your money and train you for free until you do". BOOM! Take all my money.