You need to contact the closest American Embassy. Expect a long wait and high fees. You will need all your personal paperwork in order, such as birth certificate, proof of income, police record and marriage certificate.
Invest in a US company or buy a company in the US; apply for a job with a US company if you have special qualifications; get a transfer within your company if it is based in the US. It is not easy to get a US visa.
