There is no better way to keep our focus on heaven than to read and meditate on heaven from Scripture. Here are a few good passages I picked out, followed by my commentary.

Matthew 5:8

Blessed are the pure in heart, for they shall see God.

If we maintain a pure life now we will see God though our faith “in the heavenly places in Christ” (Eph. 1:3).  And we will also see Him in His full glory in heaven.

John 14:1-4

Do not let your heart be troubled; believe in God, believe also in Me.  2 “In My Father’s house are many dwelling places; if it were not so, I would have told you; for I go to prepare a place for you.  3 “If I go and prepare a place for you, I will come again and receive you to Myself, that where I am, there you may be also.

We ought not to be troubled with our various problems in this life. If we believe in God and in His Son, we know that He (Christ) is preparing a wonderful place for us in the Father’s house in heaven. And He will very soon come to take us there.

Philippians 3:20-21

For our citizenship is in heaven, from which also we eagerly wait for a Savior, the Lord Jesus Christ; 21 who will transform the body of our humble state into conformity with the body of His glory…

Because He has made us citizens of heaven we are eagerly waiting for Him to take us to heaven and to change our earthly bodies into bodies of glory just like His own.

Colossians 3:1-3

Therefore if you have been raised up with Christ, keep seeking the things above, where Christ is, seated at the right hand of God. 2 Set your mind on the things above, not on the things that are on earth. 3 For you have died and your life is hidden with Christ in God.

If we are believers in Christ and have our citizenship in heaven, we are not to be bogged down and worried over things of this world. Instead, we are to keep thinking about and have our mind set on heavenly things (things that matter to God). For our old life is gone and our new life is now in Christ. He will protect us from all our spiritual enemies that are always out to destroy us.

1 Thessalonians 4:15-18

For this we say to you by the word of the Lord, that we who are alive and remain until the coming of the Lord, will not precede those who have fallen asleep. 16 For the Lord Himself will descend from heaven with a shout, with the voice of the archangel and with the trumpet of God, and the dead in Christ will rise first. 17 Then we who are alive and remain will be caught up together with them in the clouds to meet the Lord in the air, and so we shall always be with the Lord. 18 Therefore comfort one another with these words.

Here is probably the best, or most descriptive, passage on the Rapture of the church. It tells us plainly that when the Lord comes to take us to heaven, He will first take up (and transform) those believers who had died. I believe this includes the Old Testament as well as the New Testament believers, for they all died in Christ. Then, after the dead are risen, all those who are alive will be taken up (and transformed) with the first group; and they all will meet the Lord “in the air.” We don’t know exactly where in the air they will be, but from that point they will all be transported to heaven to the Father’s house. Now we don’t know where we will be when He comes, but we can be sure of this: we will either be one of the dead ones that are raised, or one of the living ones who are raptured alive. I hope that comforts you.

Hebrews 11:13-16

 All these people were still living by faith when they died. They did not receive the things promised; they only saw them and welcomed them from a distance. And they admitted that they were aliens and strangers on earth. 14 People who say such things show that they are looking for a country of their own. 15 If they had been thinking of the country they had left, they would have had opportunity to return. 16 Instead, they were longing for a better country — a heavenly one. Therefore God is not ashamed to be called their God, for he has prepared a city for them.

NIV

The people of faith spoken of in Hebrews 11 did not receive the promise of heaven before they died, but all their lives they remained strong in faith. For they were always looking for a better county than they left. They longed for the promised heavenly country that they knew God was preparing for them. If we want to remain faithful to God until the end, we must also as these did regard ourselves as strangers on earth—not really belonging to this world, rather having our citizenship in heaven.