This is the most important question a person could ever ask. Thankfully, we are not left on our own to "imagine" what the answer might be. God has clearly told us what we must do in order to be saved. The question is answered in the Bible! Jesus said, "And this is life eternal, that they might know Thee the only true God, and Jesus Christ, whom Thou hast sent" (John 17:3).
It is everyone's goal to have a "better life." We look for easier work, more security, more comforts and more ways to "enjoy life." However, this idea of seeking a "better life" without God is futile and potentially disastrous. God has said, "For what is your life? It is even a vapor, that appeareth for a little time, and then vanisheth away" (James 4:14). The promise of a "better life" is the bait used by Satan to lure people into a life of complacency and ease.
However, God in His goodness has revealed what true life is. His Word clearly states "He that believeth on the Son hath everlasting life" (John 3:36), and "This life is in His Son. He that hath the Son hath life, and he that hath not the Son of God hath not life" (1 John 5:11,12).
If you do not have this true life, the life that is obtained through faith in Christ Jesus, you have no life at all. No matter what possessions or comforts you may enjoy now, when it comes right down to it, you are dead--spiritually dead. You are doomed to spend an eternity apart from God in the lake of fire. These are the facts concerning your condition. But God, in His Word, sets forth the remedy--"For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord" (Romans 6:23).
How do you get this everlasting life? Jesus said, "Verily, verily, I say unto you, He that heareth My word, and believeth on Him that sent Me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life" (John 5:24).