The following suggestions are mentioned in order to help you think clearly, carefully, and biblically.

Repent from any known sin and ask the God of truth to reveal His truth to you.

Define words, always, by definition and in context.

Use a well recognized International Standard Bible Dictionary when defining Biblical terminolgy.

Use a basic standard Dictionary regularly in order to define words, terms and phrases properly.  (A full sized unabridged dictionary is preferrable in order to get a complete overview of all recognized definitions.)

Know personally The Five Basic Doctrines of the historic Christian faith.

Know the Basics of Bible Discernment and stand firm in your faith.

Understand clearly Who and What Jesus Christ  claimed to be and really is.

Understand Eight Basic Rules of Interpretation (used for 2500 years).

Understand the definition of words such as "Religion", "Cult", "Aberrant", "Heresy", etc.

Understand what a "counterfeit" is:

                   Merriam-Webster Online: Definition of Counterfeit
                   Wikipedia: Definition of Counterfeit
                   Encyclopedia Britannica: Definition of Counterfeiting

Educate yourself about the fact that false teachers and cults are real and dangerous.

Personally educate your spouse, fiance', children, etc. about these things.

Learn what Biblical Hermeneutics is and how to properly interpret the Bible.

Examine closely what is being said to you when people approach you and want to discuss with you their brand of religion, miracles, experiences, revelations, etc.

Test all things by the Word of God (1 Thessalonians 5:21-22).

Read the Bible regularly, slowly, and carefully.

Read some balanced discernment articles.

Powersearch the internet with a reliable Discernment Powersearch Engine.

Read the 20 Scripture Twisting Methods of Cults.

Read the SRN Harmful and Dangerous Spiritual Practices list.

Be careful not to buy unbiblical and heretical literature found in compromised Christian bookstores.