Pick out a key word or most-unusual word of the verse.
Turn to this word alphabetically.
Go down the column of listings until you find your verse.
Kavout ar gwerzadoù:
Faithful are the wounds of a friend
We are ambassadors of Christ.
The story of the rich man and Lazarus.
Let's say you wanted to do a study of the word "redemption." First you would look up that word in the concordance and look up references listed for it. Then you could look up related words and references listed for them, e.g. "redeem, redeemed, ransom," even "buy" or "bought."
What if you noticed a contradiction in the KJV between Mt.7:1 Judge not lest you be judgedand 1 Cor.2:15 He that is spiritual judgeth all things.Maybe there are two different Greek words here, both being translated "judge" in English? (We're using Strong's from here out.)
Go down the column of entries to Mt.7:1. To the right is a number, 2919. This refers to the Greek word used. Write it down.
Klaskit bremañ "jugeth".
Go down the column to 1 Cor.2:15 . . . . . 350.
Turn in the back to the Greek dictionary. (Remember, you're in the NT so the language is Greek, while the OT is Hebrew.) Compare the meaning of 2919 with the meaning of 350 and you have your answer!