After submitting your DS 160, you will have a confirmation number. Keep it ready with you and go to http://ustraveldocs.com/qa/index.html?firstTime=No
Once you land on this page, create a account and set up for a non immigrant visa. There it will ask for the DS 160 confirmation number. After creating account, it will give a receipt for paying Visa fee. Take that document and go to any of the commercial bank and pay the fees. And it will take 24 hours for this to be reflected in your account in US travel docs website. Once it is updated, you can schedule your appointment.

On your appointment day, carry the DS 160 confirmation page, visa fee receipt from CBQ, 6 months bank statement, your passport, letter from company for applying visa, invite letter from someone living US if possible, hotel booking confirmation if staying in hotel and any other document you seem necessary.