Step One: Find the literature relevant to your question
The first step is to see what "we" already know about your problem/issue/question:
Google Scholar is a primary source as is your library/librarian.
Check with your teaching center - they often have resource libraries!
There are often teaching books on your topic of interest:
Bain, Ken. (2004). What the Best College Teachers Do. Boston: Harvard University Press.
Fink, L. Dee. (2013). Creating Significant Learning Experiences. Jossey-Bass.
Nilson, Linda, B. (2010). Teaching at its Best. Jossey-Bass.
Other sources for SoTL research are: