"...so that being justified by His grace we would be made heirs according to the hope of eternal life."
When you think about it, I don't know that there's any good thing here we won't be able to do in heaven... consider that a moment. Whatever gifts you want to cultivate, whatever projects you want to complete... we have an eternity to enjoy God and His gifts. But what about the people?
I think eternity focuses our perspective on what really does matter. What are we here for? We are here because God is longsuffering:
"The Lord is not slow about His promise, as some count slowness, but is patient toward you, not wishing for any to perish but for all to come to repentance."
- 2 Peter 3:9
There is one thing we won't be able to do in heaven: save the lost. By then, all of God's children will be accounted for. Please understand, I'm not claiming WE can save the lost - only God can bring a person to that point - but God does call us to witness. Our lives here are the only testimony some have of our loving Father. I quickly lose track of my witness in the day-to-day necessities of life... and I start to think more about what would make things easier here, rather than what's important in the face of eternity. Yet the reason (so far as my human eyes can see) Jesus hasn't yet returned to claim His rightful place is that He is "...patient toward you, not wishing for any to perish but for all to come to repentance."
I don't know about you, but I'm not "gifted" in evangelism. I can't strike up a conversation with a random person I just met and bring them to Christ on the spot, then continue on my merry way (at least, it hasn't happened yet - God can do anything). This doesn't mean I'm not called to evangelism. Let me explain.
Many of us have put evangelism in a box: you meet a person, take them along the "Romans Road" or show them the "Bridge Illustration" and thereby share the gospel with them. There is ABSOLUTELY a place for that - but this is not the extent of evangelism. Our every moment lived out in front of people is our testimony - our evangelism to others. God placed you where you are in life to show Himself to those only you know; to minister through you as only you are positioned to. As a mother, a wife, an understanding friend, God has placed you where you are to minister His love, thereby glorifying Him. How we deal with trials, how we enjoy God's gifts, how we live... these are our testimonies of God.
This does not absolve us of broaching the subject of salvation; it gives our words weight when we share. Don't expect the opportunity to always come to you; be as intentional about sharing Christ as you are about seeking Christ.
Who is the Lord putting on your heart to share His love with? Don't be afraid!
"Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, teaching them to observe all that I commanded you; and lo, I am with you always, even to the end of the age."
- Matthew 28:19-20