You must come close to Jesus and get to know Him--this is the only place of safety.

There is coming a deception so terrible that it would be impossible to avoid being deceived were it not for this one way. The only way to avoid being deceived is to get to know the real Son of God so well that you can tell when something is not from Him. That requires standing in His Holy presence. That means practicing His presence in your daily life. That means obeying the leading of the Holy Spirit. As you do this, you will get to know Jesus ever more personally. Remember that you are finite and He is infinite. That means that you can always get to know Him better. And the better you know Him, the better it gets.

Watching out for cults will not do it.

Studying cults won't do it.

You must come close to Jesus and get to know Him.

Jesus has provided ways for you to come close to Him. 

First, you must accept the salvation that He has provided, forgiving you for all your sins and also releasing you from slavery to those sins. 

Once you have accepted Him, He has given you much.  It would be impossible to write down all that Jesus provided for those who will receive Him.  Here is a starting point.  Once you have received Jesus and His wonderful salvation, He lives in your heart.  Believe that Christ is with you and in you and in all believers.  Prayerfully read the Bible, asking that the Holy Spirit make the Word come alive to you.  Spend time in prayer.  Be filled with the Spirit.  Walk in the Spirit, and you won't fulfill the lusts of the flesh.  Spend time meditating on Jesus and the Word (Bible)--this is not to be confused with the mind-blanking demon-possession cults.  Everyone who seeks Jesus will find Jesus.  Everyone who seeks a deeper walk with Jesus will find a deeper walk with Jesus.  Those who are seeking some sort of spiritual experience have no guarantee of finding Jesus.  You must seek Jesus to find Him.  Go to a Christ-centered church that preaches the Bible as the infallible Word of God.  God has provided the church as the way to be built up to the measure of the fullness of the stature of Christ.  Ephesians 4

If you don't stand in the presence of Jesus, you will fall for something.