Before you choose to do anything else, you need to have a broad topic in mind. In the case of this particular research project, you should have something that ties your major to mediums, ghosts/hauntings, out-of-body experiences, or past-life memories. Whichever topic you choose should have a historical, pop-cultural, cross-cultural, or religious spin to it.
Once you have your topic, it's time to move on to Forming Research Questions and Finding Keywords.
A good research question should...
Once you have successfully formed and narrowed your research question, it's time to find some keywords.
"What impact, if any, does marketing have on the popularity of Coca-Cola and Pepsi?"
First look for the nouns in your question:
From there, see if there are any adjectives. In this case, there aren't, so we can go ahead and get started with our search.
You may need to fall back on concepts and terms you've come across during previous/background research or that you've learned during prior coursework in order to help narrow that down. See the tips and tricks below for some additional ways to narrow down your searching.
Tricks for Database Searching
Use Boolean Operators
Use Subject Headings