1. If you are unable to write your topic in either the form of a hypothesis
or a clear statement, you need to refine and clarify the topic. It must
be stated specifically, not in vague, imprecise terms.
2. You'll need to be able to justify what you're doing and prove that
it's worthy of your time and energy. It's always handy if you can quote
a major authority who is stating a need for the research. But if you
don't have an authority on hand, try to demonstrate that your research
is in some way significant to a major activity.
3. Be sure you have a reasonable (if not exhaustive) grasp of what's
been done before. This will help support #2.
4. Extremely important part! Exactly how do you plan to approach the
research? Try to explain as precisely as possible, and include an alternative
methodology. This part may still be in rough form, but it should indicate
the likely nature of your approach.
5. This will be important in assessing the worth of your topic. For
example, let's say you might propose the use of a questionnaire to collect
evidence. You would then need to analyze the results of the questionnaire.
Your potential outcomes (speaking generally) might be a positive correlation
between two factors, a negative one, none at all, or unsatisfactory
responses. Perhaps only one of these outcomes could lead to a dissertation.
That result could suggest the need for a different approach to the issue,
which in turn could lead you down a more productive path.