Concept Clouds can be very useful in helping you generate keywords for your search strategy.
After coming up with the keywords make sure you don't type in too many words.
Bad strategy - "Should American football officials be held responsible for NFL players neurological health issue in retirement?" -- --returns zero articles or books
Go with a simple search strategy - "NFL and Concussions" -- -- returns over 12,000 articles and books
Are you interested in this topic?
Your research will be less tedious if you are looking for something you have a personal interest in.
What exactly is your assignment?
Check with your instructor and read your assignment carefully to make sure that you are on the right track.
Questions that can help clarifying your thoughts:
If your assignment requires a source from an academic journal...
If your assignment requires a source from an academic journal, make sure to run a search in OneSearch for academic journal articles on your topic before you lock in your topic.
With certain research topics it will be difficult to find academic journal articles which means that you'll have a more difficult time with your assignment.
Always check OneSearch before locking in your topic.