There are numerous books in the Library that will help you decide on the best business structure for your enterprise and how to begin. Simply search the Library catalogue for start up.
Business Link (UK) provides detailed practical information on all kinds of new businesses and the best business structure to use for: part time businesses, franchises, social enterprises or innovative enterprises.
10 steps to develop your winning business idea
Lots of advice form the US website Startupnation
UK Government advice on setting up
Lists what you need to consider before setting up and launching your business.
London Business School Incubator
The London Business Schoool has business incubator and help students and alumn wishing to start up businesses.