If you'd like to start a new business, all you essentially need are three things: capital, a business plan, and determination. If you've got the money and all the other resources and a target market, you're set to go. But first, make sure your business plan is drawn up well.
You may have gone to business school to get some formal education on the matter, and that should have been enough to arm you with all the knowledge and skills you will initially need to start a new business. You can easily draw up an effective business plan, one that will cover everything from the early stages to about 3 or 5 years from the execution of the plan. You should have a mission and vision to anchor your business to and you must have backup plans for gathering resources, for example. Consider all appropriate methods of interacting with your target market, and in this high-tech world today it's easy to do that (email, social networking sites like Twitter, Facebook, MySpace, etc.).
If you did not go to business school, it's easy to consult with someone who has, or attend seminars and trainings to help you out. Many business experts hold gatherings like conferences where forums are held and you can mingle with other business-minded people like you. Once you have all that going, determination then comes in so you can actually push through with everything from the start, despite the challenges that come your way in your effort to start a new business.