Choose
a topic that interests you, something you'd like to know more
about.
If you're having
trouble coming up with a topic, try the following:
Check a subject
encyclopedia for ideas and concepts.
Do some exploratory
searches in an article index like ABI/Inform. Look at
the abstracts or summaries of articles that interest you; they
may give you ideas for topics. Also, look at their subject terms
for possible keywords.
Ask a librarian at the reference desk.
As an example, let's start with a very broad topic such as marketing.
You would
find way too much information on this subject--enough to write
several books! The topic is too broad.