• go to the nearest Enrolment Camp . 
• register for an Aadhaar and fill out enrolment form.
• attach documents with enrolment form and submit it .
• documents will be verified .
• then residents will go through a biometric scanning of ten fingerprints and iris. 
• They will then be photographed and given an  enrolment number upon completion.
• check out information filled in computer is correct or not. if not ,tell to correct it.
• residents will be given acknowledgment reciept .
• residents will be issued an Aadhaar UID allotment letter having unique ID no.by speed post at your address within 20 to 30 days (may be longer) .

get more info here: how to get aadhar card