There is plenty in the Bible that suggests that we should be getting better at what we do and that we should get more fruit for our efforts. Now I believe in hearing from God and doing what He says, but there is still a realm where we can get better at doing even that! We can always get better at loving the lost and reaching out into their communities.
In business the term 'continuous improvement' is often used and refers to the need to keep improving to remain competitive. We might mean it more in terms with our need to grow and reach out more effectively to more of the world.
Ephesians 1:17 I keep asking that the God of our Lord Jesus Christ, the glorious Father, may give you the Spirit of wisdom and revelation, so that you may know him better.
Acts 12:24 But the word of God continued to increase and spread.
1 Thessalonians 3:12 May the Lord make your love increase and overflow for each other and for everyone else, just as ours does for you.
The Improvement article is first place to start reading.