A thesis paper is evidence of your contribution to the knowledge on your subject matter. A successful thesis asks and answers a question that has not yet been posed in your field of study. Uncovering a problem that has already been solved and using existing research to write a paper does not demonstrate your ability to create new knowledge on a subject. Finding the right thesis topic can be a real challenge.
A thesis paper is all business. Every statement you make in your thesis must be backed by fact; you need to cut any unqualified statements out of the paper before you submit it. Unqualified statements provide thesis reviewers with easy ways to trip you up when you present and defend your thesis. The more professional and thorough your research is, the stronger the thesis.
The format for a thesis is not unlike other essay formats. You will need an introduction presenting the problem and your hypothesis, as well as why either matters. Include background information that explains the situation; move directly into current research after that. Also have a section that discusses current research projects and essays in your field. The rest of the paper goes to your research and the discoveries you made, as well as a conclusion that sums up your answer to the initial question. You will need an extended references section that provides the original information for all cited work.
Writing your thesis absorbs quite a bit of your free time and there is no way to simply come up with a thesis overnight. Choose your topic months ahead of time and talk to department heads at your school for feedback on whether the topic would be effective or worth pursuing. After you have a topic, build a schedule that gives you time each week to conduct research and work on your paper. If you break thesis writing into smaller daily chunks, the process can be a lot less tedious.