What are you passionate about? What sets your soul on fire? Whatever that is and whatever it is that makes you happy, do MORE of that. Turn a hobby into a passion and your passion into a business.
Feed and nurture it each day, the way you would a child and watch it grow! Invest in YOU and your business each day. Do something that will help your business grow, whether that's a class, networking, learning a new technique or staying current on the trends in your industry.
Starve the passion and the dream, and there is no business. Know your numbers and plan, plan, plan! Set goals and smash them. A goal without a plan is just a wish. So stop wishing and move forward, you don't have to quit your day job, but let your day job finance your dream job until you're able to walk away and follow your dream full-time.