When you receive Jesus Christ as Lord of your life, spiritual death is taken from you and you become a new creature in Christ - you are born again.  It is the Holy Spirit that makes your new birth possible.  The Holy Spirit comes to live with you when you receive Jesus into your life.

In Salvation (receiving Jesus as Saviour), the Holy Spirit baptizes us into Jesus.  Then Jesus baptizes us into the Holy Spirit.  Jesus said "You will receive POWER after that the Holy Spirit has come upon you." (Acts 1.8)  Jesus baptizes us into God's very own power and holiness so that we can live a life full of the greater works He has called us to do as His Anointed Body.  Baptism with the Holy Spirit and Fire are received synonymously.  The FIRE spoken of here is referencing the Power and Holiness of God. 

In order to obtain from heaven the Holy Spirit, it is first necessary that you know that your sins are blotted out, that the Blood of Jesus Christ has cleansed your heart and cleansed you from the sinful nature, the inherent nature of sin.  When you have repented of a life apart from God and believe Christ's sacrifice on the cross for your sin, you are transferred (baptized) into the body of Christ, and become a member of His body.    

After you become a new creation, God's desire and plan is that you receive the Baptism in the Holy Spirit.  The Baptism in the Holy Spirit is received by faith in God.  Jesus said -"If you then, who are evil, know how to give good gifts to your children, how much more will the heavenly Father give the Holy Spirit to those who ask Him!" 

When you ask the heavenly Father for the gift of the Holy Spirit, He will fill you with the Holy Spirit to overflowing and you will speak in tongues as the Holy Spirit gives you the utterance.

Speaking in tongues is simply speaking in a language that only God understands (even you will not understand it).  This happens as the Holy Spirit prays through you about things you may not know about or may not know how to pray about (Romans 8.26).

The Holy Spirit was given by Jesus to be our Helper.  When you pray in tongues, the Holy Spirit searches your heart and prays through you the perfect will of God (Romans 8.26-27).  You actually utter secret truths and hidden things which are not obvious to the understanding of your mind (I Corinthians 14.2)

To pray in tongues, you need to realize that speaking with an unknown tongue is the voice of your heart.  Speaking in a tongue or language you know is the voice of your human mind (unless one of the nine vocal gifts of the Spirit of God is in operation through you as God may move upon you).  The Holy Spirit of God will give you utterance to speak in tongues, the same as your mind gives you thoughts to speak (Acts 2.4)

To speak in tongues, you must cooperate with the Holy Spirit and trust Him.  The Apostle Paul said in 1 Corinthians 14.14, "If I pray in an unknown tongue, my spirit [by the Holy Spirit within me] prays, but my mind is unproductive..."  Notice that it was Paul who did the speaking and the Holy Spirit supplied the words.

Ask the Holy Spirit to take charge of your tongue, then yield your tongue to His use.  You cannot speak in your own language and tongue at the same time, just as you cannot speak in English and French at the same time. 

When your voice and tongue begin forming syllables around the expressions that your heart desires to release, you will also speak in tongues.  It will be your tongue, your breath, your vocal cords and you will be actively forming words.  You will supply the sounds, but the Holy Spirit will supply the words - words that are unknown to you.  Continue to speak the words that the Holy Spirit gives to you.  Like a child learning to speak, you will grow and develop in the new language that the Holy Spirit is giving to you.

When you ask your heavenly Father for one of His promises - such as the Baptism of the Holy Spirit - you can be confident that the gift given is from God.

If you want to receive your baptism in the Holy Spirit, ask Him now:

Heavenly Father, I am a believer.  I am Your child and You are my Father.  Jesus is my Lord.  I believe with all my heart that Your Word is true.  Your Word says that if I will ask, I will receive the Holy Spirit.  So in the Name of Jesus Christ my Lord, I am asking You to fill me to overflowing with Your precious Holy Spirit.  Jesus, baptize me in the Holy Spirit.  Because of Your Word, I believe that I now receive this gift and I thank You for it.  Holy Spirit, rise up within me as I give praise to God.  I fully expect to speak with other tongues as You give me the utterance.

Now begin giving sound to the expressions in you heart.  Speak and hear the Holy Spirit speaking through you.  Rejoice in Him because you have just been endued with God's very own power.  And His power is in you to help you to live a life that is free from sin and fully pleasing to Him.