Avoid ideas that really don't have a future. You can sidestep this heartache by asking yourself those three questions. How solid and thorough your answers, though, will depend on your research. You can make sure your idea has longevity by digging up some information on trends for the next century that substantiate your thoughts. Testing your idea against the past, present and future is also critical.
Major libraries carry both types of books.
There are a few government agencies, private foundations and organizations who give individuals money to finance startup. My book research included interviewing Norton Kiritz, president of The Grantmanship Center in Los Angeles. He explained that the majority of available grant money is really targeted at nonprofit organizations and government agencies. These groups use the money to fund a variety of special projects such as community revitalization, job training or research, with a limited amount of money awarded to individuals for scholarships and financial aid or to fund artistic activities or fellowships. All you'll receive for your money is recycled list information from directories of foundations and grant sources who do not give money for starting businesses.