A thesis represents your mastery of a particular subject area in sociology. It can take many forms, from a book length manuscript to (more typically) a journal-article length/style paper. Your thesis should be ready to submit to peer-reviewed journal when you finish this program. However, the actual nature of your thesis must be negotiated through your thesis committee.
Below are some basic steps (which may differ in certain circumstances):
Find a topic that interests you.
Find a Chair that can work with you.
Consult with your Chair about writing your thesis proposal.
At the same time, contact two (2) other faculty members to serve as committee members.
When your Chair says that your proposal is ready, you share it with the entire committee.
With your committee, schedule your proposal defense.
Once you have defended your proposal, you must get IRB approval of your project.
When your project is fully approved, you collect and analyze your data.
Once your thesis is very strong, you will schedule a thesis defense.
Upon successfully defending your thesis, you will make any last edits and consult the Graduate School regarding the file format that they require for thesis.
You may also find these resources helpful in formatting your thesis.