1. Complete the online DS-160 form: refer to the other post for sample DS-160 Form on the website.
2. Verify the DS-160 form thoroughly: Once you have completed all mandatory fields in the DS-160 form, you will have verify and cross-check all the details entered. These details must match your passport, I-20 and SEVIS fee receipt. All the necessary information regarding education, job experience and other activities has to be entered correctly and hence the verification of the DS-160.
3. Submit DS-160 form and print confirmation page with barcode: After successfully completing theDS-160 form, a confirmation page having a 10-digit barcode will be available to you. You will have to take a print out of this page. This page is required at the time of the US F1 VISA interview. This print must be taken on a LASER printer or a high quality printer. It is not necessary to print the DS-160 in colour, black and white print of DS-160 is allowed for F1 VISA.
4. Print a DS-160 US VISA application form for reference: When you complete and submit the application, a link to print your completed US VISA form will be available to you. This link will be valid only for the first time. Once the session times out, the DS-160 form print link will be disabled. So, make sure you get a print of the form in the first session when you complete and submit your form. This form is not required for F1 US VISA interview.
Online Form – https://ceac.state.gov/genniv/
Guidelines to fill the form – http://www.ustraveldocs.com/in/in-niv-ds160info.asp
Common Instructions – https://ceac.state.gov/GenNIV/Common/Instructions.aspx
Documents required for the Application – http://travel.state.gov/content/visas/english/forms/ds-160–online-nonimmigrant-visa-application/frequently-asked-questions.html
FAQs – http://travel.state.gov/content/visas/english/forms/ds-160–online-nonimmigrant-visa-application/frequently-asked-questions.html