Fellow students can also help, particularly students who are a year or two ahead of you. They will have already undertaken the same or a similar subject to you and written a thesis as required by their course. Asking if you can read their corrected work can be a great source of finding a good thesis example.
To answer this, one would have to go back to the basics of researching. Every thesis is the result of some research or the other. So, what one really needs to see in a good thesis example is whether or not the research was worthwhile.
Thesis Statements - The Writing Center
And finally there is the online availability of essays. By searching for good thesis examples, it is possible to be able to read a wide variety of essays all of which should give ideas and layout information to help you produce a good thesis example.