Basic Document -

Passport with at least two blank pages, valid for at least 6 months
All previous passports.
Personal Bank Statement / Company Bank Statement with bank solvency certificate of Last Six (06) Months.
Recent two (02) copy color photographs. (35 mm X 45 mm, White background)
Travel health insurance, valid for all Schengen countries.

For Job Holder:-

No Objection Certificate 
Salary Certificate.
Pay slips - if any
G.O (Government Order) for Official Passport
BMDC certificate for Doctor 
BAR council Certificate for Advocate

For Business Person:- 

Renewal Trade License Copy.
Certificate of Incorporation and Memorandum of your Company (only pages, where director's names are mentioned). (If you are an owner director of a company)
Office pad / Company Letter Head Pad
Import & Export Certificate - if any
TIN / Income Tax Certificate - if any

For Student:-

Student ID card Photo Copy.
Leave letter from school/college/university.

Other supporting document (a) Tour Program (b) Visiting card (c) Marriage certificate (d) Birth certificate of children (e) Document of properties (f) Bluebook photocopy of the car if any (g) Document of other income if any (h) All documents of financial solvency like FDR/ Share business/ other savings/Security Deposit/cash investment etc. (i) National Identity Card Copy.