If I live in NJ how can I incorporate a new business in Delaware? Do I need to hire a Delaware attorney?

It is very common for businesses to incorporate in Delaware, and it doesn't matter where the shareholders live.  There should be no reason you need to hire a Delaware attorney, as many New Jersey attorneys can help you.  In fact, you may feel comfortable doing it yourself.  I believe that you can get instructions for doing so, and forms, from the website for the Delaware Department of State, Division of Corporations.