James Strong published a concordance, the most widely used in the English-speaking world. However, the overuse of concordances has helped to throw expository preaching in the corner.

I have never really been one to use Bible Study courses, but not everyone is like I am. For those who speak Spanish, Cursos Bíblicos por correspondencia are available, and just now I have added Cours bibliques par correspondance.

The best way for me is to read the Bible, or perhaps use a Strong’s Concordance.

The danger with concordances is that we tend to think of the Bible as a set of theological statements, rather than a narrative of God dealing with man.  It has been noted that most of today’s preaching is topical in nature, rather than expository.  Not that topical preaching is bad, but a 90/10 balance of probably better called an imbalance.