Try friends and family first. If they can't help, try the bank - you'll need a detailed business plan. As a last resort, you could advertise for investors.
The best thing you could do, is know what your talking about. After that, check your local banks, people with alot of money that are in buisness, it is unwise to go in with family or a friend so i wouldn't advise that.
You need
(1). Money for starting the business
(2).Idea
(3).Decide which business
(4) Experience
(5) managing capacity
(6)marketing
(7)Good Place
(8) financial assistance from bank
(9) Office facility
(10) Good contact
(11) Business trick
(12) pleasant nature
(13) Interest